cpu/rpx0xx: implement periph_spi

boards/rpi-pico/Kconfig

@@ -14,5 +14,6 @@ config BOARD_RPI_PICO
  select CPU_MODEL_RP2040
  select HAS_PERIPH_ADC
  select HAS_PERIPH_UART
+ select HAS_PERIPH_SPI
 
  select HAVE_SAUL_GPIO

boards/rpi-pico/Makefile.features

@@ -2,5 +2,6 @@ CPU := rpx0xx
 
 # Put defined MCU peripherals here (in alphabetical order)
 FEATURES_PROVIDED += periph_adc
+FEATURES_PROVIDED += periph_spi
 FEATURES_PROVIDED += periph_timer
 FEATURES_PROVIDED += periph_uart

boards/rpi-pico/include/periph_conf.h

@@ -48,6 +48,23 @@ static const uart_conf_t uart_config[] = {
 
 #define UART_NUMOF ARRAY_SIZE(uart_config)
 
+static const spi_conf_t spi_config[] = {
+ {
+ .dev = SPI0,
+ .miso_pin = GPIO_PIN(0, 4),
+ .mosi_pin = GPIO_PIN(0, 3),
+ .clk_pin = GPIO_PIN(0, 2)
+ },
+ {
+ .dev = SPI1,
+ .miso_pin = GPIO_PIN(0, 12),
+ .mosi_pin = GPIO_PIN(0, 11),
+ .clk_pin = GPIO_PIN(0, 10)
+ }
+};
+
+#define SPI_NUMOF ARRAY_SIZE(spi_config)
+
 static const timer_channel_conf_t timer0_channel_config[] = {
  {
  .irqn = TIMER_IRQ_0_IRQn

cpu/rpx0xx/include/periph_cpu.h

@@ -731,6 +731,39 @@ void rosc_stop(void);
 
 /** @} */
 
+/**
+ * @brief Override SPI clock speed values
+ * @{
+ */
+#define HAVE_SPI_CLK_T
+enum {
+ SPI_CLK_100KHZ = KHZ(100), /**< drive the SPI bus with 100KHz */
+ SPI_CLK_400KHZ = KHZ(400), /**< drive the SPI bus with 400KHz */
+ SPI_CLK_1MHZ = MHZ(1), /**< drive the SPI bus with 1MHz */
+ SPI_CLK_5MHZ = MHZ(5), /**< drive the SPI bus with 5MHz */
+ SPI_CLK_10MHZ = MHZ(10), /**< drive the SPI bus with 10MHz */
+};
+
+/**
+ * @brief SPI clock type
+ */
+typedef uint32_t spi_clk_t;
+/** @} */
+
+/**
+ * @brief Configuration details for an SPI interface needed by the RPX0XX peripheral
+ */
+typedef struct {
+ SPI0_Type *dev; /**< Base address of the I/O registers of the device */
+ gpio_t miso_pin; /**< GPIO pin to use for MISO */
+ gpio_t mosi_pin; /**< GPIO pin to use for MOSI */
+ gpio_t clk_pin; /**< GPIO pin to use for CLK */
+} spi_conf_t;
+
+#define PERIPH_SPI_NEEDS_TRANSFER_REG
+#define PERIPH_SPI_NEEDS_TRANSFER_REGS
+#define PERIPH_SPI_NEEDS_TRANSFER_BYTE
+
 #ifdef __cplusplus
 }
 #endif