SPI interface suggestion #42

platform/arch/platform_arduino.h

@@ -60,7 +60,7 @@ EXPORT void delay_ms(uint32_t time) { delay(time); }
 typedef struct {
   uint8_t address;
 } i2c_device_t;
-
+//#include <Wire.h>
 
 /**
  * Inicializa a biblioteca wire e acessa o bus 12c como controlador
@@ -137,4 +137,57 @@ EXPORT void gpio_toggle(gpio_pin_t pin) {
   pinMode(pin.pin, OUTPUT);
   digitalWrite(pin.pin, !digitalRead(pin.pin));
 }
+//#endif
+
+/**
+ * Essa macro só é definida se o SPI for ser utilizado
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ */
+//#if defined(HAL_SPI_MODULE_ENABLED)
+
+
+typedef struct {
+  gpio_pin_t pin;
+} spi_device_t;
+//#include <SPI.h>
+
+/**
+ * Inicializa a biblioteca SPI 
+ * Configura os pinos de SCK, MOSI e SS como outputs
+ * Pulling SCK e MOSI como low e SS como high
+ * 
+ */
+SPI.begin();
+#if defined(WIRE_HAS_TIMEOUT)
+    Wire.setWireTimeout(TIMEOUT, true);
+#endif
+
+EXPORT error_t spi_transceive(spi_device_t device, buffer_view_t rx_buffer,
+                              buffer_view_t tx_buffer) {
+
+  if (tx_buffer.size != rx_buffer.size) {
+    return 1;
+  }
+  rx_buffer.data = SPI.transfer(tx_buffer.data); //receive rx and transmit tx
+  error_t error = rx_buffer;
+  return error;
+}
+
+EXPORT error_t spi_receive(spi_device_t device, buffer_view_t buffer_view) {
+  buffer_view.data = SPI.transfer(0x00); //envia um 0 para receber os dados
+  error_t error = buffer_view;
+  return error;
+}
+
+EXPORT error_t spi_transmit(spi_device_t device, buffer_view_t buffer_view) {
+  error_t error = SPI.transfer(buffer_view.data);
+  return error;
+}
+
 //#endif