firmware: drivers: sx127x: Implementation of the SPI and GPIO interfa…

…ces #60
spacelab-ufsc · Dec 17, 2021 · 77058cb · 77058cb
1 parent 3dd8dfb
commit 77058cb
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Showing 3 changed files with 47 additions and 12 deletions.
diff --git a/firmware/drivers/sx127x/sx127x.h b/firmware/drivers/sx127x/sx127x.h
@@ -522,13 +522,13 @@ static int sx127x_spi_read(uint8_t *data, uint16_t len);
 static int sx127x_gpio_init(void);
 
 /**
- * \brief Write the state of the SDN pin.
+ * \brief Write the state of the RESET pin.
  *
- * \param[in] state is new state of the SDN pin.
+ * \param[in] state is new state of the RESET pin.
  *
  * \return The status/error code.
  */
-static int sx127X_gpio_write_sdn(bool state);
+static int sx127X_gpio_write_reset(bool state);
 
 /**
  * \brief Reads the state of the nIRQ pin.

diff --git a/firmware/drivers/sx127x/sx127x_gpio.c b/firmware/drivers/sx127x/sx127x_gpio.c
@@ -38,19 +38,43 @@
 
 #include "sx127x.h"
 
+/* GPIO configuration */
+#define SX127X_GPIO_RESET_PIN           GPIO_PIN_16
+#define SX127X_GPIO_NIRQ_PIN            GPIO_PIN_17
+
 int sx127x_gpio_init(void)
 {
-    return -1;
+    int err = 0;
+
+    gpio_config_t conf = {0};
+
+    conf.mode = GPIO_MODE_OUTPUT;
+
+    /* RESET pin */
+    if (gpio_init(SX127X_GPIO_RESET_PIN, conf) != 0)
+    {
+        err = -1;
+    }
+
+    conf.mode = GPIO_MODE_INPUT;
+
+    /* nIRQ pin */
+    if (gpio_init(SX127X_GPIO_NIRQ_PIN, conf) != 0)
+    {
+        err = -1;
+    }
+
+    return err;
 }
 
-int sx127X_gpio_write_sdn(bool state)
+int sx127X_gpio_write_reset(bool state)
 {
-    return -1;
+    return gpio_set_state(SX127X_GPIO_RESET_PIN, state);
 }
 
 int sx127x_gpio_read_nirq(void)
 {
-    return -1;
+    return gpio_get_state(SX127X_GPIO_NIRQ_PIN);
 }
 
 /** \} End of sx127x group */
diff --git a/firmware/drivers/sx127x/sx127x_spi.c b/firmware/drivers/sx127x/sx127x_spi.c
@@ -38,29 +38,40 @@
 
 #include "sx127x.h"
 
+/* SPI configuration */
+#define SX127X_SPI_PORT         SPI_PORT_3
+#define SX127X_SPI_CS_PIN       SPI_CS_0
+#define SX127X_SPI_MODE         SPI_MODE_1
+#define SX127X_SPI_SPEED        CONFIG_SPI_PORT_0_SPEED_BPS
+
 int sx127x_spi_init(void)
 {
-    return -1;
+    spi_config_t conf = {0};
+
+    conf.speed_hz   = SX127X_SPI_SPEED;
+    conf.mode       = SX127X_SPI_MODE;
+
+    return spi_init(SX127X_SPI_PORT, conf);
 }
 
 int sx127x_spi_transfer(uint8_t *wd, uint8_t *rd, uint16_t len)
 {
-    return -1;
+    return spi_transfer(SX127X_SPI_PORT, SX127X_SPI_CS_PIN, wd, rd, len);
 }
 
 int sx127x_spi_write_byte(uint8_t byte)
 {
-    return -1;
+    return spi_write(SX127X_SPI_PORT, SX127X_SPI_CS_PIN, &byte, 1);
 }
 
 int sx127x_spi_write(uint8_t *data, uint16_t len)
 {
-    return -1;
+    return spi_write(SX127X_SPI_PORT, SX127X_SPI_CS_PIN, data, len);
 }
 
 int sx127x_spi_read(uint8_t *data, uint16_t len)
 {
-    return -1;
+    return spi_read(SX127X_SPI_PORT, SX127X_SPI_CS_PIN, data, len);
 }
 
 /** \} End of sx127x group */