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TARGET_MCUXpresso_MCUS I2C driver: Add explicit pinmap support

pull/11892/head
Przemyslaw Stekiel 2019-08-28 13:17:44 +02:00
parent 618bd18ef5
commit e0fdee9f0d
1 changed files with 32 additions and 11 deletions
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43
targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/api/i2c_api.c
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@ -32,14 +32,18 @@ static I2C_Type *const i2c_addrs[] = I2C_BASE_PTRS;
/* Array of I2C bus clock frequencies */
static clock_name_t const i2c_clocks[] = I2C_CLOCK_FREQS;
void i2c_init(i2c_t *obj, PinName sda, PinName scl)
#if EXPLICIT_PINMAP_READY
#define I2C_INIT_DIRECT i2c_init_direct
void i2c_init_direct(i2c_t *obj, const i2c_pinmap_t *pinmap)
#else
#define I2C_INIT_DIRECT _i2c_init_direct
static void _i2c_init_direct(i2c_t *obj, const i2c_pinmap_t *pinmap)
#endif
{
uint32_t i2c_sda = pinmap_peripheral(sda, PinMap_I2C_SDA);
uint32_t i2c_scl = pinmap_peripheral(scl, PinMap_I2C_SCL);
PORT_Type *port_addrs[] = PORT_BASE_PTRS;
PORT_Type *base = port_addrs[sda >> GPIO_PORT_SHIFT];
PORT_Type *base = port_addrs[pinmap->sda_pin >> GPIO_PORT_SHIFT];
obj->instance = pinmap_merge(i2c_sda, i2c_scl);
obj->instance = (uint32_t) pinmap->peripheral;
obj->next_repeated_start = 0;
MBED_ASSERT((int)obj->instance != NC);
@ -49,19 +53,36 @@ void i2c_init(i2c_t *obj, PinName sda, PinName scl)
I2C_MasterInit(i2c_addrs[obj->instance], &master_config, CLOCK_GetFreq(i2c_clocks[obj->instance]));
I2C_EnableInterrupts(i2c_addrs[obj->instance], kI2C_GlobalInterruptEnable);
pinmap_pinout(sda, PinMap_I2C_SDA);
pinmap_pinout(scl, PinMap_I2C_SCL);
pin_function(pinmap->sda_pin, pinmap->sda_function);
pin_mode(pinmap->sda_pin, PullNone);
pin_function(pinmap->scl_pin, pinmap->scl_function);
pin_mode(pinmap->scl_pin, PullNone);
/* Enable internal pullup resistor */
base->PCR[sda & 0xFF] |= (PORT_PCR_PE_MASK | PORT_PCR_PS_MASK);
base->PCR[scl & 0xFF] |= (PORT_PCR_PE_MASK | PORT_PCR_PS_MASK);
base->PCR[pinmap->sda_pin & 0xFF] |= (PORT_PCR_PE_MASK | PORT_PCR_PS_MASK);
base->PCR[pinmap->scl_pin & 0xFF] |= (PORT_PCR_PE_MASK | PORT_PCR_PS_MASK);
#if defined(FSL_FEATURE_PORT_HAS_OPEN_DRAIN) && FSL_FEATURE_PORT_HAS_OPEN_DRAIN
base->PCR[sda & 0xFF] |= PORT_PCR_ODE_MASK;
base->PCR[scl & 0xFF] |= PORT_PCR_ODE_MASK;
base->PCR[pinmap->sda_pin & 0xFF] |= PORT_PCR_ODE_MASK;
base->PCR[pinmap->scl_pin & 0xFF] |= PORT_PCR_ODE_MASK;
#endif
}
void i2c_init(i2c_t *obj, PinName sda, PinName scl)
{
uint32_t i2c_sda = pinmap_peripheral(sda, PinMap_I2C_SDA);
uint32_t i2c_scl = pinmap_peripheral(scl, PinMap_I2C_SCL);
int peripheral = (int)pinmap_merge(i2c_sda, i2c_scl);
int sda_function = (int)pinmap_find_function(sda, PinMap_I2C_SDA);
int scl_function = (int)pinmap_find_function(scl, PinMap_I2C_SCL);
const i2c_pinmap_t explicit_i2c_pinmap = {peripheral, sda, sda_function, scl, scl_function};
I2C_INIT_DIRECT(obj, &explicit_i2c_pinmap);
}
int i2c_start(i2c_t *obj)
{
I2C_Type *base = i2c_addrs[obj->instance];