Merge pull request #331 from bcostm/master

[NUCLEO_xxx] Update xxx_free() functions + typo

libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F030R8/gpio_api.c

@@ -65,8 +65,7 @@ void gpio_mode(gpio_t *obj, PinMode mode) {
 void gpio_dir(gpio_t *obj, PinDirection direction) {
     if (direction == PIN_OUTPUT) {
         pin_function(obj->pin, STM_PIN_DATA(GPIO_Mode_OUT, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF));
-    }
+    } else { // PIN_INPUT
-    else { // PIN_INPUT
         pin_function(obj->pin, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
     }
 }

libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F030R8/gpio_irq_api.c

@@ -53,8 +53,7 @@ static void handle_interrupt_in(uint32_t irq_index) {
     uint32_t pin = (uint32_t)(1 << channel_pin[irq_index]);
 
     // Clear interrupt flag
-    if (EXTI_GetITStatus(pin) != RESET)
+    if (EXTI_GetITStatus(pin) != RESET) {
-    {
         EXTI_ClearITPendingBit(pin);
     }
 
@@ -63,16 +62,21 @@ static void handle_interrupt_in(uint32_t irq_index) {
     // Check which edge has generated the irq
     if ((gpio->IDR & pin) == 0) {
         irq_handler(channel_ids[irq_index], IRQ_FALL);
-    }
+    } else  {
-    else  {
         irq_handler(channel_ids[irq_index], IRQ_RISE);
     }
 }
 
 // The irq_index is passed to the function
-static void gpio_irq0(void) {handle_interrupt_in(0);}
+static void gpio_irq0(void) {
-static void gpio_irq1(void) {handle_interrupt_in(1);}
+    handle_interrupt_in(0);
-static void gpio_irq2(void) {handle_interrupt_in(2);}
+}
+static void gpio_irq1(void) {
+    handle_interrupt_in(1);
+}
+static void gpio_irq2(void) {
+    handle_interrupt_in(2);
+}
 
 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
 
@@ -91,18 +95,15 @@ int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32
         irq_n = EXTI0_1_IRQn;
         vector = (uint32_t)&gpio_irq0;
         irq_index = 0;
-    }
+    } else if ((pin_index == 2) || (pin_index == 3)) {
-    else if ((pin_index == 2) || (pin_index == 3)) {
         irq_n = EXTI2_3_IRQn;
         vector = (uint32_t)&gpio_irq1;
         irq_index = 1;
-    }
+    } else if ((pin_index > 3) && (pin_index < 16)) {
-    else if ((pin_index > 3) && (pin_index < 16)) {
         irq_n = EXTI4_15_IRQn;
         vector = (uint32_t)&gpio_irq2;
         irq_index = 2;
-    }
+    } else {
-    else {
         error("InterruptIn error: pin not supported.\n");
         return -1;
     }
@@ -170,8 +171,7 @@ void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
         if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
             EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
             obj->event = EDGE_BOTH;
-        }
+        } else { // NONE or RISE
-        else { // NONE or RISE
             EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
             obj->event = EDGE_RISE;
         }
@@ -181,8 +181,7 @@ void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
         if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
             EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
             obj->event = EDGE_BOTH;
-        }
+        } else { // NONE or FALL
-        else { // NONE or FALL
             EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
             obj->event = EDGE_FALL;
         }
@@ -190,8 +189,7 @@ void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
 
     if (enable) {
         EXTI_InitStructure.EXTI_LineCmd = ENABLE;
-    }
+    } else {
-    else {
         EXTI_InitStructure.EXTI_LineCmd = DISABLE;
     }
 

libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F030R8/gpio_object.h

@@ -50,8 +50,7 @@ typedef struct {
 static inline void gpio_write(gpio_t *obj, int value) {
     if (value) {
         *obj->reg_set = obj->mask;
-    }
+    } else {
-    else {
         *obj->reg_clr = obj->mask;
     }
 }

libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F030R8/i2c_api.c

@@ -315,8 +315,7 @@ int i2c_slave_receive(i2c_t *obj) {
             // Check direction
             if (I2C_GetFlagStatus(i2c, I2C_ISR_DIR) == SET) {
                 event = ReadAddressed;
-        }
+            } else event = WriteAddressed;
-        else event = WriteAddressed;
             // Clear adress match flag to generate an acknowledge
             i2c->ICR |= I2C_ICR_ADDRCF;
         }

libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F030R8/objects.h

@@ -58,11 +58,6 @@ struct analogin_s {
     PinName pin;
 };
 
-struct dac_s {
-    DACName dac;
-    PinName channel;
-};
-
 struct serial_s {
     UARTName uart;
     int index; // Used by irq
@@ -70,6 +65,8 @@ struct serial_s {
     uint32_t databits;
     uint32_t stopbits;
     uint32_t parity;
+    PinName pin_tx;
+    PinName pin_rx;
 };
 
 struct spi_s {
@@ -80,6 +77,10 @@ struct spi_s {
     uint32_t mode;
     uint32_t nss;
     uint32_t br_presc;
+    PinName pin_miso;
+    PinName pin_mosi;
+    PinName pin_sclk;
+    PinName pin_ssel;
 };
 
 struct i2c_s {

libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F030R8/port_api.c

@@ -67,8 +67,7 @@ void port_dir(port_t *obj, PinDirection dir) {
         if (obj->mask & (1 << i)) { // If the pin is used
             if (dir == PIN_OUTPUT) {
                 pin_function(port_pin(obj->port, i), STM_PIN_DATA(GPIO_Mode_OUT, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF));
-            }
+            } else { // PIN_INPUT
-            else { // PIN_INPUT
                 pin_function(port_pin(obj->port, i), STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
             }
         }
@@ -91,8 +90,7 @@ void port_write(port_t *obj, int value) {
 int port_read(port_t *obj) {
     if (obj->direction == PIN_OUTPUT) {
         return (*obj->reg_out & obj->mask);
-    }
+    } else { // PIN_INPUT
-    else { // PIN_INPUT
         return (*obj->reg_in & obj->mask);
     }
 }

libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F030R8/pwmout_api.c

@@ -79,7 +79,6 @@ void pwmout_init(pwmout_t* obj, PinName pin) {
 
     // Configure GPIO
     pinmap_pinout(pin, PinMap_PWM);
-    //pin_mode(pin, PullUp);
 
     obj->pin = pin;
     obj->period = 0;
@@ -89,8 +88,8 @@ void pwmout_init(pwmout_t* obj, PinName pin) {
 }
 
 void pwmout_free(pwmout_t* obj) {
-    TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
+    // Configure GPIOs
-    TIM_DeInit(tim);
+    pin_function(obj->pin, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
 }
 
 void pwmout_write(pwmout_t* obj, float value) {

libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F030R8/rtc_api.c

@@ -68,8 +68,7 @@ void rtc_init(void) {
         while (RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET) {} // Wait until ready
         RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI); // Select the RTC Clock Source
         rtc_freq = 40000; // [TODO] To be measured precisely using a timer input capture
-    }  
+    } else {
-    else {
         // The LSE has correctly started
         RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE); // Select the RTC Clock Source
         rtc_freq = LSE_VALUE;
@@ -91,7 +90,16 @@ void rtc_init(void) {
 }
 
 void rtc_free(void) {
-    RCC_DeInit(); // Resets the RCC clock configuration to the default reset state
+    // Reset RTC
+    PWR_BackupAccessCmd(ENABLE); // Enable access to Backup Domain
+    RTC_DeInit();
+    RCC_BackupResetCmd(ENABLE);
+    RCC_BackupResetCmd(DISABLE);
+    // Disable RTC, LSE and LSI clocks
+    RCC_RTCCLKCmd(DISABLE);
+    RCC_LSEConfig(RCC_LSE_OFF);
+    RCC_LSICmd(DISABLE);
+
     rtc_inited = 0;
 }
 

libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F030R8/serial_api.c

@@ -92,9 +92,11 @@ void serial_init(serial_t *obj, PinName tx, PinName rx) {
     // Enable USART clock
     if (obj->uart == UART_1) {
         RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
+        obj->index = 0;
     }
     if (obj->uart == UART_2) {
         RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
+        obj->index = 1;
     }
 
     // Configure the UART pins
@@ -109,11 +111,10 @@ void serial_init(serial_t *obj, PinName tx, PinName rx) {
     obj->stopbits = USART_StopBits_1;
     obj->parity = USART_Parity_No;
 
-    init_usart(obj);
+    obj->pin_tx = tx;
+    obj->pin_rx = rx;
 
-    // The index is used by irq
+    init_usart(obj);
-    if (obj->uart == UART_1) obj->index = 0;
-    if (obj->uart == UART_2) obj->index = 1;
 
     // For stdio management
     if (obj->uart == STDIO_UART) {
@@ -124,6 +125,22 @@ void serial_init(serial_t *obj, PinName tx, PinName rx) {
 }
 
 void serial_free(serial_t *obj) {
+    // Reset UART and disable clock
+    if (obj->uart == UART_1) {
+        RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, ENABLE);
+        RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, DISABLE);
+        RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, DISABLE);
+    }
+    if (obj->uart == UART_2) {
+        RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, ENABLE);
+        RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, DISABLE);
+        RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, DISABLE);
+    }
+
+    // Configure GPIOs
+    pin_function(obj->pin_tx, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
+    pin_function(obj->pin_rx, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
+
     serial_irq_ids[obj->index] = 0;
 }
 
@@ -135,8 +152,7 @@ void serial_baud(serial_t *obj, int baudrate) {
 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) {
     if (data_bits == 8) {
         obj->databits = USART_WordLength_8b;
-    }
+    } else {
-    else {
         obj->databits = USART_WordLength_9b;
     }
 
@@ -156,8 +172,7 @@ void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_b
 
     if (stop_bits == 2) {
         obj->stopbits = USART_StopBits_2;
-    }
+    } else {
-    else {
         obj->stopbits = USART_StopBits_1;
     }
 
@@ -182,8 +197,12 @@ static void uart_irq(USART_TypeDef* usart, int id) {
     }
 }
 
-static void uart1_irq(void) {uart_irq((USART_TypeDef*)UART_1, 0);}
+static void uart1_irq(void) {
-static void uart2_irq(void) {uart_irq((USART_TypeDef*)UART_2, 1);}
+    uart_irq((USART_TypeDef*)UART_1, 0);
+}
+static void uart2_irq(void) {
+    uart_irq((USART_TypeDef*)UART_2, 1);
+}
 
 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) {
     irq_handler = handler;
@@ -209,8 +228,7 @@ void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) {
 
         if (irq == RxIrq) {
             USART_ITConfig(usart, USART_IT_RXNE, ENABLE);
-        }
+        } else { // TxIrq
-        else { // TxIrq
             USART_ITConfig(usart, USART_IT_TC, ENABLE);
         }
 
@@ -225,8 +243,7 @@ void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) {
             USART_ITConfig(usart, USART_IT_RXNE, DISABLE);
             // Check if TxIrq is disabled too
             if ((usart->CR1 & USART_CR1_TXEIE) == 0) all_disabled = 1;
-        }
+        } else { // TxIrq
-        else { // TxIrq
             USART_ITConfig(usart, USART_IT_TXE, DISABLE);
             // Check if RxIrq is disabled too
             if ((usart->CR1 & USART_CR1_RXNEIE) == 0) all_disabled = 1;

libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F030R8/sleep.c

@@ -33,8 +33,7 @@
 
 #include "cmsis.h"
 
-void sleep(void)
+void sleep(void) {
-{
     // Disable us_ticker update interrupt
     TIM_ITConfig(TIM1, TIM_IT_Update, DISABLE);
 
@@ -47,8 +46,7 @@ void sleep(void)
 
 // MCU STOP mode
 // Wake-up with external interrupt
-void deepsleep(void)
+void deepsleep(void) {
-{
     // Enable PWR clock
     RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
 

libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F030R8/spi_api.c

@@ -122,11 +122,15 @@ void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel
     obj->cpha = SPI_CPHA_1Edge;
     obj->br_presc = SPI_BaudRatePrescaler_8; // 1 MHz
 
+    obj->pin_miso = miso;
+    obj->pin_mosi = mosi;
+    obj->pin_sclk = sclk;
+    obj->pin_ssel = ssel;
+
     if (ssel == NC) { // Master
         obj->mode = SPI_Mode_Master;
         obj->nss = SPI_NSS_Soft;
-    }
+    } else { // Slave
-    else { // Slave
         pinmap_pinout(ssel, PinMap_SPI_SSEL);
         obj->mode = SPI_Mode_Slave;
         obj->nss = SPI_NSS_Hard;
@@ -136,16 +140,31 @@ void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel
 }
 
 void spi_free(spi_t *obj) {
-    SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
+    // Reset SPI and disable clock
-    SPI_I2S_DeInit(spi);
+    if (obj->spi == SPI_1) {
+        RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1, ENABLE);
+        RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1, DISABLE);
+        RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, DISABLE);
+    }
+
+    if (obj->spi == SPI_2) {
+        RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI2, ENABLE);
+        RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI2, DISABLE);
+        RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, DISABLE);
+    }
+
+    // Configure GPIOs
+    pin_function(obj->pin_miso, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
+    pin_function(obj->pin_mosi, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
+    pin_function(obj->pin_sclk, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
+    pin_function(obj->pin_ssel, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
 }
 
 void spi_format(spi_t *obj, int bits, int mode, int slave) {
     // Save new values
     if (bits == 8) {
         obj->bits = SPI_DataSize_8b;
-    }
+    } else {
-    else {
         obj->bits = SPI_DataSize_16b;
     }
 
@@ -171,8 +190,7 @@ void spi_format(spi_t *obj, int bits, int mode, int slave) {
     if (slave == 0) {
         obj->mode = SPI_Mode_Master;
         obj->nss = SPI_NSS_Soft;
-    }
+    } else {
-    else {
         obj->mode = SPI_Mode_Slave;
         obj->nss = SPI_NSS_Hard;
     }
@@ -184,26 +202,19 @@ void spi_frequency(spi_t *obj, int hz) {
     // Note: The frequencies are obtained with SPI clock = 48 MHz (APB1 & APB2 clocks)
     if (hz < 300000) {
         obj->br_presc = SPI_BaudRatePrescaler_256; // 188 kHz
-    }
+    } else if ((hz >= 300000) && (hz < 700000)) {
-    else if ((hz >= 300000) && (hz < 700000)) {
         obj->br_presc = SPI_BaudRatePrescaler_128; // 375 kHz
-    }
+    } else if ((hz >= 700000) && (hz < 1000000)) {
-    else if ((hz >= 700000) && (hz < 1000000)) {
         obj->br_presc = SPI_BaudRatePrescaler_64; // 750 kHz
-    }
+    } else if ((hz >= 1000000) && (hz < 3000000)) {
-    else if ((hz >= 1000000) && (hz < 3000000)) {
         obj->br_presc = SPI_BaudRatePrescaler_32; // 1.5 MHz
-    }
+    } else if ((hz >= 3000000) && (hz < 6000000)) {
-    else if ((hz >= 3000000) && (hz < 6000000)) {
         obj->br_presc = SPI_BaudRatePrescaler_16; // 3 MHz
-    }
+    } else if ((hz >= 6000000) && (hz < 12000000)) {
-    else if ((hz >= 6000000) && (hz < 12000000)) {
         obj->br_presc = SPI_BaudRatePrescaler_8; // 6 MHz
-    }
+    } else if ((hz >= 12000000) && (hz < 24000000)) {
-    else if ((hz >= 12000000) && (hz < 24000000)) {
         obj->br_presc = SPI_BaudRatePrescaler_4; // 12 MHz
-    }
+    } else { // >= 24000000
-    else { // >= 24000000
         obj->br_presc = SPI_BaudRatePrescaler_2; // 24 MHz
     }
     init_spi(obj);
@@ -230,8 +241,7 @@ static inline void ssp_write(spi_t *obj, int value) {
     while (!ssp_writeable(obj));
     if (obj->bits == SPI_DataSize_8b) {
         SPI_SendData8(spi, (uint8_t)value);
-    }
+    } else { // 16-bit
-    else { // 16-bit
         SPI_I2S_SendData16(spi, (uint16_t)value);
     }
 }
@@ -241,8 +251,7 @@ static inline int ssp_read(spi_t *obj) {
     while (!ssp_readable(obj));
     if (obj->bits == SPI_DataSize_8b) {
         return (int)SPI_ReceiveData8(spi);
-    }
+    } else { // 16-bit
-    else { // 16-bit
         return (int)SPI_I2S_ReceiveData16(spi);
     }
 }
@@ -267,8 +276,7 @@ int spi_slave_read(spi_t *obj) {
     SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
     if (obj->bits == SPI_DataSize_8b) {
         return (int)SPI_ReceiveData8(spi);
-    }
+    } else { // 16-bit
-    else { // 16-bit
         return (int)SPI_I2S_ReceiveData16(spi);
     }
 }
@@ -278,8 +286,7 @@ void spi_slave_write(spi_t *obj, int value) {
     while (!ssp_writeable(obj));
     if (obj->bits == SPI_DataSize_8b) {
         SPI_SendData8(spi, (uint8_t)value);
-    }
+    } else { // 16-bit
-    else { // 16-bit
         SPI_I2S_SendData16(spi, (uint16_t)value);
     }
 }

libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F030R8/us_ticker.c

@@ -67,14 +67,12 @@ static void tim_oc_irq_handler(void) {
     if (oc_rem_part > 0) {
         set_compare(oc_rem_part); // Finish the remaining time left
         oc_rem_part = 0;
-    }
+    } else {
-    else {
         if (oc_int_part > 0) {
             set_compare(0xFFFF);
             oc_rem_part = cval; // To finish the counter loop the next time
             oc_int_part--;
-        }
+        } else {
-        else {
             us_ticker_irq_handler();
         }
     }
@@ -139,8 +137,7 @@ void us_ticker_set_interrupt(unsigned int timestamp) {
 
     if (delta <= 0) { // This event was in the past
         us_ticker_irq_handler();
-    }
+    } else {
-    else {
         oc_int_part = (uint32_t)(delta >> 16);
         oc_rem_part = (uint16_t)(delta & 0xFFFF);
         if (oc_rem_part <= (0xFFFF - cval)) {

libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F302R8/analogout_api.c

@@ -57,7 +57,7 @@ void analogout_init(dac_t *obj, PinName pin) {
     pinmap_pinout(pin, PinMap_DAC);
 
     // Save the channel for future use
-    obj->channel = pin;
+    obj->pin = pin;
 
     // Enable DAC clock
     RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);
@@ -76,7 +76,7 @@ void analogout_free(dac_t *obj) {
     DAC_DeInit(dac);
     RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, DISABLE);
     // Configure GPIO
-    pin_function(obj->channel, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
+    pin_function(obj->pin, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
 }
 
 static inline void dac_write(dac_t *obj, uint16_t value) {

libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F302R8/i2c_api.c

@@ -145,8 +145,7 @@ void i2c_frequency(i2c_t *obj, int hz) {
                 error("Only 100kHz, 200kHz, 400kHz and 1MHz I2C frequencies are supported.");
                 break;
         }
-    }
+    } else if (SystemCoreClock == 72000000) {
-    else if (SystemCoreClock == 72000000) {
         switch (hz) {
             case 100000:
                 tim = 0x10C08DCF; // Standard mode
@@ -171,8 +170,7 @@ void i2c_frequency(i2c_t *obj, int hz) {
                 error("Only 100kHz, 200kHz, 400kHz and 1MHz I2C frequencies are supported.");
                 break;
         }
-    }
+    } else {
-    else {
         error("System clock setting is not supported.");
     }
 
@@ -362,8 +360,7 @@ int i2c_slave_receive(i2c_t *obj) {
             // Check direction
             if (I2C_GetFlagStatus(i2c, I2C_ISR_DIR) == SET) {
                 event = ReadAddressed;
-            }
+            } else event = WriteAddressed;
-            else event = WriteAddressed;
             // Clear adress match flag to generate an acknowledge
             i2c->ICR |= I2C_ICR_ADDRCF;
         }

libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F302R8/objects.h

@@ -60,7 +60,7 @@ struct analogin_s {
 
 struct dac_s {
     DACName dac;
-    PinName channel;
+    PinName pin;
 };
 
 struct serial_s {
@@ -70,6 +70,8 @@ struct serial_s {
     uint32_t databits;
     uint32_t stopbits;
     uint32_t parity;
+    PinName pin_tx;
+    PinName pin_rx;
 };
 
 struct spi_s {
@@ -80,6 +82,10 @@ struct spi_s {
     uint32_t mode;
     uint32_t nss;
     uint32_t br_presc;
+    PinName pin_miso;
+    PinName pin_mosi;
+    PinName pin_sclk;
+    PinName pin_ssel;
 };
 
 struct i2c_s {

libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F302R8/pwmout_api.c

@@ -112,8 +112,8 @@ void pwmout_init(pwmout_t* obj, PinName pin) {
 }
 
 void pwmout_free(pwmout_t* obj) {
-    TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
+    // Configure GPIO
-    TIM_DeInit(tim);
+    pin_function(obj->pin, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
 }
 
 void pwmout_write(pwmout_t* obj, float value) {

libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F302R8/rtc_api.c

@@ -68,8 +68,7 @@ void rtc_init(void) {
         while (RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET) {} // Wait until ready
         RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI); // Select the RTC Clock Source
         rtc_freq = 40000; // [TODO] To be measured precisely using a timer input capture
-    }  
+    } else {
-    else {
         // The LSE has correctly started
         RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE); // Select the RTC Clock Source
         rtc_freq = LSE_VALUE;
@@ -91,7 +90,16 @@ void rtc_init(void) {
 }
 
 void rtc_free(void) {
-    RCC_DeInit(); // Resets the RCC clock configuration to the default reset state
+    // Reset RTC
+    PWR_BackupAccessCmd(ENABLE); // Enable access to Backup Domain
+    RTC_DeInit();
+    RCC_BackupResetCmd(ENABLE);
+    RCC_BackupResetCmd(DISABLE);
+    // Disable RTC, LSE and LSI clocks
+    RCC_RTCCLKCmd(DISABLE);
+    RCC_LSEConfig(RCC_LSE_OFF);
+    RCC_LSICmd(DISABLE);
+
     rtc_inited = 0;
 }
 

libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F302R8/serial_api.c

@@ -103,12 +103,15 @@ void serial_init(serial_t *obj, PinName tx, PinName rx) {
     // Enable USART clock
     if (obj->uart == UART_1) {
         RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
+        obj->index = 0;
     }
     if (obj->uart == UART_2) {
         RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
+        obj->index = 1;
     }
     if (obj->uart == UART_3) {
         RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
+        obj->index = 2;
     }
 
     // Configure the UART pins
@@ -123,12 +126,10 @@ void serial_init(serial_t *obj, PinName tx, PinName rx) {
     obj->stopbits = USART_StopBits_1;
     obj->parity = USART_Parity_No;
 
-    init_usart(obj);
+    obj->pin_tx = tx;
+    obj->pin_rx = rx;
 
-    // The index is used by irq
+    init_usart(obj);
-    if (obj->uart == UART_1) obj->index = 0;
-    if (obj->uart == UART_2) obj->index = 1;
-    if (obj->uart == UART_3) obj->index = 2;
 
     // For stdio management
     if (obj->uart == STDIO_UART) {
@@ -139,6 +140,27 @@ void serial_init(serial_t *obj, PinName tx, PinName rx) {
 }
 
 void serial_free(serial_t *obj) {
+    // Reset UART and disable clock
+    if (obj->uart == UART_1) {
+        RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, ENABLE);
+        RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, DISABLE);
+        RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, DISABLE);
+    }
+    if (obj->uart == UART_2) {
+        RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, ENABLE);
+        RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, DISABLE);
+        RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, DISABLE);
+    }
+    if (obj->uart == UART_3) {
+        RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, ENABLE);
+        RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, DISABLE);
+        RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, DISABLE);
+    }
+
+    // Configure GPIOs
+    pin_function(obj->pin_tx, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
+    pin_function(obj->pin_rx, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
+
     serial_irq_ids[obj->index] = 0;
 }
 

libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F302R8/spi_api.c

@@ -125,6 +125,11 @@ void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel
     obj->cpha = SPI_CPHA_1Edge;
     obj->br_presc = SPI_BaudRatePrescaler_256;
 
+    obj->pin_miso = miso;
+    obj->pin_mosi = mosi;
+    obj->pin_sclk = sclk;
+    obj->pin_ssel = ssel;
+
     if (ssel == NC) { // Master
         obj->mode = SPI_Mode_Master;
         obj->nss = SPI_NSS_Soft;
@@ -138,8 +143,23 @@ void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel
 }
 
 void spi_free(spi_t *obj) {
-    SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
+    // Reset SPI and disable clock
-    SPI_I2S_DeInit(spi);
+    if (obj->spi == SPI_2) {
+        RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI2, ENABLE);
+        RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI2, DISABLE);
+        RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, DISABLE);
+    }
+    if (obj->spi == SPI_3) {
+        RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI3, ENABLE);
+        RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI3, DISABLE);
+        RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI3, DISABLE);
+    }
+
+    // Configure GPIOs
+    pin_function(obj->pin_miso, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
+    pin_function(obj->pin_mosi, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
+    pin_function(obj->pin_sclk, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
+    pin_function(obj->pin_ssel, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
 }
 
 void spi_format(spi_t *obj, int bits, int mode, int slave) {

libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_L152RE/rtc_api.c

@@ -90,7 +90,16 @@ void rtc_init(void) {
 }
 
 void rtc_free(void) {
-    RCC_DeInit(); // Resets the RCC clock configuration to the default reset state
+    // Reset RTC
+    PWR_RTCAccessCmd(ENABLE); // Enable access to Backup Domain
+    RTC_DeInit();
+    RCC_RTCResetCmd(ENABLE);
+    RCC_RTCResetCmd(DISABLE);
+    // Disable RTC, LSE and LSI clocks
+    RCC_RTCCLKCmd(DISABLE);
+    RCC_LSEConfig(RCC_LSE_OFF);
+    RCC_LSICmd(DISABLE);
+
     rtc_inited = 0;
 }