ARMmbed
/
mbed-os
mirror of https://github.com/ARMmbed/mbed-os.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

MCUXpresso: Update SPI driver 

Move the clock setup and peripheral reset to the init function

Signed-off-by: Mahesh Mahadevan <mahesh.mahadevan@nxp.com>
pull/10067/head
Mahesh Mahadevan 2019-02-11 16:03:39 -06:00 committed by Cruz Monrreal II
parent 1dc9a6760c
commit 9efcd955ce
1 changed files with 51 additions and 48 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

83
targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC/spi_api.c
View File

@ -28,6 +28,7 @@
/* Array of SPI peripheral base address. */
static SPI_Type *const spi_address[] = SPI_BASE_PTRS;
static int baud_rate = 0;
void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel)
{
@ -42,45 +43,6 @@ void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel
obj->instance = pinmap_merge(spi_data, spi_cntl);
MBED_ASSERT((int)obj->instance != NC);
// pin out the spi pins
pinmap_pinout(mosi, PinMap_SPI_MOSI);
pinmap_pinout(miso, PinMap_SPI_MISO);
pinmap_pinout(sclk, PinMap_SPI_SCLK);
if (ssel != NC) {
pinmap_pinout(ssel, PinMap_SPI_SSEL);
}
}
void spi_free(spi_t *obj)
{
SPI_Deinit(spi_address[obj->instance]);
}
void spi_format(spi_t *obj, int bits, int mode, int slave)
{
spi_master_config_t master_config;
spi_slave_config_t slave_config;
/* Bits: values between 4 and 16 are valid */
MBED_ASSERT(bits >= 4 && bits <= 16);
obj->bits = bits;
if (slave) {
/* Slave config */
SPI_SlaveGetDefaultConfig(&slave_config);
slave_config.dataWidth = (spi_data_width_t)(bits - 1);
slave_config.polarity = (mode & 0x2) ? kSPI_ClockPolarityActiveLow : kSPI_ClockPolarityActiveHigh;
slave_config.phase = (mode & 0x1) ? kSPI_ClockPhaseSecondEdge : kSPI_ClockPhaseFirstEdge;
SPI_SlaveInit(spi_address[obj->instance], &slave_config);
} else {
/* Master config */
SPI_MasterGetDefaultConfig(&master_config);
master_config.dataWidth = (spi_data_width_t)(bits - 1);
master_config.polarity = (mode & 0x2) ? kSPI_ClockPolarityActiveLow : kSPI_ClockPolarityActiveHigh;
master_config.phase = (mode & 0x1) ? kSPI_ClockPhaseSecondEdge : kSPI_ClockPhaseFirstEdge;
master_config.direction = kSPI_MsbFirst;
switch (obj->instance) {
case 0:
CLOCK_AttachClk(kFRO12M_to_FLEXCOMM0);
@ -126,15 +88,56 @@ void spi_format(spi_t *obj, int bits, int mode, int slave)
RESET_PeripheralReset(kFC9_RST_SHIFT_RSTn);
break;
#endif
}
// pin out the spi pins
pinmap_pinout(mosi, PinMap_SPI_MOSI);
pinmap_pinout(miso, PinMap_SPI_MISO);
pinmap_pinout(sclk, PinMap_SPI_SCLK);
if (ssel != NC) {
pinmap_pinout(ssel, PinMap_SPI_SSEL);
}
}
void spi_free(spi_t *obj)
{
SPI_Deinit(spi_address[obj->instance]);
}
void spi_format(spi_t *obj, int bits, int mode, int slave)
{
spi_master_config_t master_config;
spi_slave_config_t slave_config;
/* Bits: values between 4 and 16 are valid */
MBED_ASSERT(bits >= 4 && bits <= 16);
obj->bits = bits;
if (slave) {
/* Slave config */
SPI_SlaveGetDefaultConfig(&slave_config);
slave_config.dataWidth = (spi_data_width_t)(bits - 1);
slave_config.polarity = (mode & 0x2) ? kSPI_ClockPolarityActiveLow : kSPI_ClockPolarityActiveHigh;
slave_config.phase = (mode & 0x1) ? kSPI_ClockPhaseSecondEdge : kSPI_ClockPhaseFirstEdge;
SPI_SlaveInit(spi_address[obj->instance], &slave_config);
} else {
/* Master config */
SPI_MasterGetDefaultConfig(&master_config);
master_config.dataWidth = (spi_data_width_t)(bits - 1);
master_config.polarity = (mode & 0x2) ? kSPI_ClockPolarityActiveLow : kSPI_ClockPolarityActiveHigh;
master_config.phase = (mode & 0x1) ? kSPI_ClockPhaseSecondEdge : kSPI_ClockPhaseFirstEdge;
master_config.direction = kSPI_MsbFirst;
if (baud_rate > 0) {
master_config.baudRate_Bps = baud_rate;
}
SPI_MasterInit(spi_address[obj->instance], &master_config, 12000000);
}
}
void spi_frequency(spi_t *obj, int hz)
{
baud_rate = hz;
SPI_MasterSetBaud(spi_address[obj->instance], (uint32_t)hz, 12000000);
}