mbed official
mbed library sources
Dependents: Encrypted my_mbed lklk CyaSSL_DTLS_Cellular ... more
Superseded
This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.
Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.
If you are looking for a stable and tested release, please import one of the official mbed library releases:
Import librarymbed
The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.
Last commit 20 Feb 2019 by 
mbed official
Diff: targets/hal/TARGET_STM/TARGET_NUCLEO_F302R8/spi_api.c
- Revision:
- 135:067cc8ba23da
- Parent:
- 125:23cc3068a9e4
- Child:
- 198:322bca33c29c
--- a/targets/hal/TARGET_STM/TARGET_NUCLEO_F302R8/spi_api.c Tue Mar 25 09:30:07 2014 +0000
+++ b/targets/hal/TARGET_STM/TARGET_NUCLEO_F302R8/spi_api.c Tue Mar 25 10:15:07 2014 +0000
@@ -74,19 +74,19 @@
SPI_Cmd(spi, DISABLE);
- SPI_InitStructure.SPI_Mode = obj->mode;
- SPI_InitStructure.SPI_NSS = obj->nss;
- SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
- SPI_InitStructure.SPI_DataSize = obj->bits;
- SPI_InitStructure.SPI_CPOL = obj->cpol;
- SPI_InitStructure.SPI_CPHA = obj->cpha;
+ SPI_InitStructure.SPI_Mode = obj->mode;
+ SPI_InitStructure.SPI_NSS = obj->nss;
+ SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
+ SPI_InitStructure.SPI_DataSize = obj->bits;
+ SPI_InitStructure.SPI_CPOL = obj->cpol;
+ SPI_InitStructure.SPI_CPHA = obj->cpha;
SPI_InitStructure.SPI_BaudRatePrescaler = obj->br_presc;
- SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
- SPI_InitStructure.SPI_CRCPolynomial = 7;
+ SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
+ SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(spi, &SPI_InitStructure);
- SPI_RxFIFOThresholdConfig(spi, SPI_RxFIFOThreshold_QF);
-
+ SPI_RxFIFOThresholdConfig(spi, SPI_RxFIFOThreshold_QF);
+
SPI_Cmd(spi, ENABLE);
}
@@ -96,40 +96,39 @@
SPIName spi_miso = (SPIName)pinmap_peripheral(miso, PinMap_SPI_MISO);
SPIName spi_sclk = (SPIName)pinmap_peripheral(sclk, PinMap_SPI_SCLK);
SPIName spi_ssel = (SPIName)pinmap_peripheral(ssel, PinMap_SPI_SSEL);
-
+
SPIName spi_data = (SPIName)pinmap_merge(spi_mosi, spi_miso);
SPIName spi_cntl = (SPIName)pinmap_merge(spi_sclk, spi_ssel);
-
+
obj->spi = (SPIName)pinmap_merge(spi_data, spi_cntl);
-
+
if (obj->spi == (SPIName)NC) {
error("SPI pinout mapping failed");
}
-
+
// Enable SPI clock
if (obj->spi == SPI_2) {
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
+ RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
}
if (obj->spi == SPI_3) {
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI3, ENABLE);
+ RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI3, ENABLE);
}
-
+
// Configure the SPI pins
pinmap_pinout(mosi, PinMap_SPI_MOSI);
pinmap_pinout(miso, PinMap_SPI_MISO);
pinmap_pinout(sclk, PinMap_SPI_SCLK);
-
+
// Save new values
obj->bits = SPI_DataSize_8b;
obj->cpol = SPI_CPOL_Low;
obj->cpha = SPI_CPHA_1Edge;
obj->br_presc = SPI_BaudRatePrescaler_256;
-
+
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_Soft;
@@ -143,71 +142,62 @@
SPI_I2S_DeInit(spi);
}
-void spi_format(spi_t *obj, int bits, int mode, int slave) {
+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;
}
-
+
switch (mode) {
case 0:
- obj->cpol = SPI_CPOL_Low;
- obj->cpha = SPI_CPHA_1Edge;
- break;
+ obj->cpol = SPI_CPOL_Low;
+ obj->cpha = SPI_CPHA_1Edge;
+ break;
case 1:
- obj->cpol = SPI_CPOL_Low;
- obj->cpha = SPI_CPHA_2Edge;
- break;
+ obj->cpol = SPI_CPOL_Low;
+ obj->cpha = SPI_CPHA_2Edge;
+ break;
case 2:
- obj->cpol = SPI_CPOL_High;
- obj->cpha = SPI_CPHA_1Edge;
- break;
+ obj->cpol = SPI_CPOL_High;
+ obj->cpha = SPI_CPHA_1Edge;
+ break;
default:
- obj->cpol = SPI_CPOL_High;
- obj->cpha = SPI_CPHA_2Edge;
- break;
+ obj->cpol = SPI_CPOL_High;
+ obj->cpha = SPI_CPHA_2Edge;
+ break;
}
-
+
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;
+ obj->nss = SPI_NSS_Hard;
}
-
+
init_spi(obj);
}
void spi_frequency(spi_t *obj, int hz) {
- // Note: The frequencies are obtained with SPI2 clock = 32 MHz (APB1 clock)
+ // Values depend of PCLK1: 32 MHz if HSI is used, 36 MHz if HSE is used
if (hz < 250000) {
- obj->br_presc = SPI_BaudRatePrescaler_256; // 125 kHz
- }
- else if ((hz >= 250000) && (hz < 500000)) {
- obj->br_presc = SPI_BaudRatePrescaler_128; // 250 kHz
- }
- else if ((hz >= 500000) && (hz < 1000000)) {
- obj->br_presc = SPI_BaudRatePrescaler_64; // 500 kHz
- }
- else if ((hz >= 1000000) && (hz < 2000000)) {
- obj->br_presc = SPI_BaudRatePrescaler_32; // 1 MHz
- }
- else if ((hz >= 2000000) && (hz < 4000000)) {
- obj->br_presc = SPI_BaudRatePrescaler_16; // 2 MHz
- }
- else if ((hz >= 4000000) && (hz < 8000000)) {
- obj->br_presc = SPI_BaudRatePrescaler_8; // 4 MHz
- }
- else if ((hz >= 8000000) && (hz < 16000000)) {
- obj->br_presc = SPI_BaudRatePrescaler_4; // 8 MHz
- }
- else { // >= 16000000
- obj->br_presc = SPI_BaudRatePrescaler_2; // 16 MHz
+ obj->br_presc = SPI_BaudRatePrescaler_256; // 125 kHz - 141 kHz
+ } else if ((hz >= 250000) && (hz < 500000)) {
+ obj->br_presc = SPI_BaudRatePrescaler_128; // 250 kHz - 280 kHz
+ } else if ((hz >= 500000) && (hz < 1000000)) {
+ obj->br_presc = SPI_BaudRatePrescaler_64; // 500 kHz - 560 kHz
+ } else if ((hz >= 1000000) && (hz < 2000000)) {
+ obj->br_presc = SPI_BaudRatePrescaler_32; // 1 MHz - 1.13 MHz
+ } else if ((hz >= 2000000) && (hz < 4000000)) {
+ obj->br_presc = SPI_BaudRatePrescaler_16; // 2 MHz - 2.25 MHz
+ } else if ((hz >= 4000000) && (hz < 8000000)) {
+ obj->br_presc = SPI_BaudRatePrescaler_8; // 4 MHz - 4.5 MHz
+ } else if ((hz >= 8000000) && (hz < 16000000)) {
+ obj->br_presc = SPI_BaudRatePrescaler_4; // 8 MHz - 9 MHz
+ } else { // >= 16000000
+ obj->br_presc = SPI_BaudRatePrescaler_2; // 16 MHz - 18 MHz
}
init_spi(obj);
}
@@ -217,7 +207,7 @@
SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
// Check if data is received
status = ((SPI_I2S_GetFlagStatus(spi, SPI_I2S_FLAG_RXNE) != RESET) ? 1 : 0);
- return status;
+ return status;
}
static inline int ssp_writeable(spi_t *obj) {
@@ -229,23 +219,21 @@
}
static inline void ssp_write(spi_t *obj, int value) {
- SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
+ SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
while (!ssp_writeable(obj));
if (obj->bits == SPI_DataSize_8b) {
SPI_SendData8(spi, (uint8_t)value);
- }
- else {
+ } else {
SPI_I2S_SendData16(spi, (uint16_t)value);
}
}
static inline int ssp_read(spi_t *obj) {
- SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
+ SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
while (!ssp_readable(obj));
if (obj->bits == SPI_DataSize_8b) {
return (int)SPI_ReceiveData8(spi);
- }
- else {
+ } else {
return (int)SPI_I2S_ReceiveData16(spi);
}
}
@@ -270,19 +258,17 @@
SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
if (obj->bits == SPI_DataSize_8b) {
return (int)SPI_ReceiveData8(spi);
- }
- else {
+ } else {
return (int)SPI_I2S_ReceiveData16(spi);
}
}
void spi_slave_write(spi_t *obj, int value) {
- SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
- while (!ssp_writeable(obj));
+ SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
+ while (!ssp_writeable(obj));
if (obj->bits == SPI_DataSize_8b) {
SPI_SendData8(spi, (uint8_t)value);
- }
- else {
+ } else {
SPI_I2S_SendData16(spi, (uint16_t)value);
}
}
