From a303f425308b764265ae852d1f6502cc17707c8c Mon Sep 17 00:00:00 2001
From: jacqueline <me@jacqueline.id.au>
Date: Wed, 21 Sep 2022 10:49:04 +1000
Subject: [PATCH] Define more pins, also init spi

---
 main/gay-ipod-fw.cpp | 65 ++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 59 insertions(+), 6 deletions(-)

diff --git a/main/gay-ipod-fw.cpp b/main/gay-ipod-fw.cpp
index 1ca65f7a..15d7b6eb 100644
--- a/main/gay-ipod-fw.cpp
+++ b/main/gay-ipod-fw.cpp
@@ -1,12 +1,29 @@
 #include <stdio.h>
 
 #include "esp_log.h"
+#include "driver/gpio.h"
 #include "driver/i2c.h"
+#include "driver/spi_common.h"
+#include "driver/spi_master.h"
+#include "hal/gpio_types.h"
+#include "hal/spi_types.h"
 
-#define I2C_SDA_IO (0)
-#define I2C_SCL_IO (4)
-// TODO: check if fast mode i2c (400000) will work.
-#define I2C_CLOCK_HZ (100000)
+#define I2C_SDA_IO (GPIO_NUM_0)
+#define I2C_SCL_IO (GPIO_NUM_4)
+#define I2C_CLOCK_HZ (400000)
+
+#define SPI_SDI_IO (GPIO_NUM_19)
+#define SPI_SDO_IO (GPIO_NUM_23)
+#define SPI_SCLK_IO (GPIO_NUM_18)
+#define SPI_QUADWP_IO (GPIO_NUM_22)
+#define SPI_QUADHD_IO (GPIO_NUM_21)
+
+#define I2S_SCK_IO (GPIO_NUM_25)
+#define I2S_BCK_IO (GPIO_NUM_26)
+#define I2S_LRCK_IO (GPIO_NUM_27)
+#define I2S_DIN_IO (GPIO_NUM_5)
+
+static const char* TAG = "MAIN";
 
 esp_err_t init_i2c(void) {
   int i2c_port = 0;
@@ -19,15 +36,51 @@ esp_err_t init_i2c(void) {
     .master = {
       .clk_speed = I2C_CLOCK_HZ,
     },
+    // TODO: check flags
     .clk_flags = 0,
   };
-  // TODO: INT line?
 
   ESP_ERROR_CHECK(i2c_param_config(i2c_port, &config));
-  return i2c_driver_install(i2c_port, config.mode, 0, 0, 0);
+  ESP_ERROR_CHECK(i2c_driver_install(i2c_port, config.mode, 0, 0, 0));
+
+  // TODO: INT line
+  // TODO: add devices to the bus (DAC and GPIO expander)
+
+  return ESP_OK;
+}
+
+esp_err_t init_spi(void) {
+  spi_bus_config_t config = {
+    .mosi_io_num = SPI_SDO_IO,
+    .miso_io_num = SPI_SDI_IO,
+    .sclk_io_num = SPI_SCLK_IO,
+    .quadwp_io_num = SPI_QUADWP_IO,
+    .quadhd_io_num = SPI_QUADHD_IO,
+
+    // Unused
+    .data4_io_num = -1,
+    .data5_io_num = -1,
+    .data6_io_num = -1,
+    .data7_io_num = -1,
+
+    // Use the DMA default size.
+    .max_transfer_sz = 0,
+    // TODO: check flags
+    .flags = 0,
+    .intr_flags = 0,
+  };
+
+  ESP_ERROR_CHECK(spi_bus_initialize(VSPI_HOST, &config, SPI_DMA_CH_AUTO));
+
+  // TODO: CS lines
+  // TODO: add devices to the bus (sd card and display)
+
+  return ESP_OK;
 }
 
 extern "C" void app_main(void)
 {
+  ESP_LOGI(TAG, "Initialising peripherals");
   init_i2c();
+  init_spi();
 }