minor changes

soc/software/bsp/include/bsp/pmod_spi.h

@@ -13,6 +13,16 @@ void bsp_pmod_spi_init(void);
 void bsp_pmod_spi_set_mode(bsp_pmod_spi_mode_t mode);
 bsp_pmod_spi_mode_t bsp_pmod_spi_mode(void);
 void bsp_pmod_spi_set_quad(int enabled);
+
+/*
+ * Configure delays used by the chip-select-managed transaction helpers.
+ * All values are in microseconds. Zero disables the corresponding delay.
+ */
+void bsp_pmod_spi_set_timing(uint32_t cs_setup_us,
+                             uint32_t inter_byte_us,
+                             uint32_t cs_hold_us,
+                             uint32_t cs_inactive_us);
+
 void bsp_pmod_spi_select(void);
 void bsp_pmod_spi_deselect(void);
 int bsp_pmod_spi_ready(void);
@@ -20,6 +30,22 @@ uint32_t bsp_pmod_spi_ctrl(void);
 uint32_t bsp_pmod_spi_rx(void);
 uint8_t bsp_pmod_spi_xfer8(uint8_t value);
 uint32_t bsp_pmod_spi_xfer32(uint32_t value);
+
+/* Raw byte transfer; the caller controls chip select. */
 void bsp_pmod_spi_transfer(const uint8_t *tx, uint8_t *rx, size_t len);
 
+/* Byte transaction with chip select and the configured timing delays. */
+void bsp_pmod_spi_transaction(const uint8_t *tx, uint8_t *rx, size_t len);
+
+/*
+ * Register helpers accept the complete command byte. The caller is
+ * responsible for applying device-specific read/write bits to command.
+ */
+void bsp_pmod_spi_write_reg8(uint8_t command, uint8_t value);
+uint8_t bsp_pmod_spi_read_reg8(uint8_t command, uint8_t dummy);
+void bsp_pmod_spi_read_regs(uint8_t command,
+                            uint8_t dummy,
+                            uint8_t *data,
+                            size_t len);
+
 #endif