Merge pull request #9845 from jarlamsa/stm_spi_peripheral_name

Add spi_get_peripheral_name() to stm_spi

Author: 0xc0170

targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F429xI/TARGET_NUCLEO_F429ZI/PeripheralNames.h

@@ -57,6 +57,7 @@ typedef enum {
     UART_8 = (int)UART8_BASE
 } UARTName;
 
+#define SPI_COUNT 6
 typedef enum {
     SPI_1 = (int)SPI1_BASE,
     SPI_2 = (int)SPI2_BASE,

targets/TARGET_STM/stm_spi_api.c

@@ -92,6 +92,24 @@ void init_spi(spi_t *obj)
     }
 }
 
+SPIName spi_get_peripheral_name(PinName mosi, PinName miso, PinName sclk) {
+    SPIName spi_mosi = (SPIName)pinmap_peripheral(mosi, PinMap_SPI_MOSI);
+    SPIName spi_miso = (SPIName)pinmap_peripheral(miso, PinMap_SPI_MISO);
+    SPIName spi_sclk = (SPIName)pinmap_peripheral(sclk, PinMap_SPI_SCLK);
+
+    SPIName spi_per;
+
+    // If 3 wire SPI is used, the miso is not connected.
+    if (miso == NC) {
+        spi_per = (SPIName)pinmap_merge(spi_mosi, spi_sclk);
+    } else {
+        SPIName spi_data = (SPIName)pinmap_merge(spi_mosi, spi_miso);
+        spi_per = (SPIName)pinmap_merge(spi_data, spi_sclk);
+    }
+
+    return spi_per;
+}
+
 void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel)
 {
     struct spi_s *spiobj = SPI_S(obj);