Make compatible with V0 badges again

Since we don't need to control reset to fix EPD stuck problems
wire it back to PTA20 and revert the code changes.

1 files changed, 8 insertions, 17 deletions

diff --git a/laser-tag software/epaper.c b/laser-tag software/epaper.c
index af6aa90..a1c6391 100644
--- a/laser-tag software/epaper.c
+++ b/laser-tag software/epaper.c
@@ -2,8 +2,6 @@
 #include "fsl_gpio_driver.h"
 #include "fsl_spi_dma_master_driver.h"
 
-#define HAS_RESET   0
-
 typedef enum {       /* Image pixel -> Display pixel */
     EPD_compensate,  /* B -> W, W -> B (Current Image) */
     EPD_white,       /* B -> N, W -> W (Current Image) */
@@ -11,14 +9,14 @@ typedef enum {       /* Image pixel -> Display pixel */
     EPD_normal       /* B -> B, W -> W (New Image) */
 } EPD_stage;
 
-static const gpio_output_pin_user_config_t pinReset = {
+static const gpio_output_pin_user_config_t pinDischarge = {
     .pinName = GPIO_MAKE_PIN(GPIOA_IDX, 19),
     .config.outputLogic = 0,
 };
 
 static const gpio_output_pin_user_config_t pinCS = {
     .pinName = GPIO_MAKE_PIN(GPIOD_IDX, 4),
-    .config.outputLogic = 0,
+    .config.outputLogic = 1,
 };
 
 static const spi_dma_master_user_config_t spiConfig = {
@@ -48,7 +46,7 @@ void EPD_Init()
     PORT_HAL_SetMuxMode(g_portBase[GPIOD_IDX], 5, kPortMuxAlt2);
     PORT_HAL_SetMuxMode(g_portBase[GPIOD_IDX], 6, kPortMuxAlt2);
     PORT_HAL_SetMuxMode(g_portBase[GPIOD_IDX], 7, kPortMuxAlt2);
-    GPIO_DRV_OutputPinInit(&pinReset);
+    GPIO_DRV_OutputPinInit(&pinDischarge);
     GPIO_DRV_OutputPinInit(&pinCS);
 }
 
@@ -223,18 +221,6 @@ int EPD_Draw(const uint8_t *old_image, const uint8_t *new_image)
     uint32_t calculatedBaudRate;
     SPI_DRV_DmaMasterConfigureBus(1, &spiConfig, &calculatedBaudRate);
 
-    /* Reset */
-#if HAS_RESET
-    GPIO_DRV_WritePinOutput(pinReset.pinName, 0);
-#endif
-    GPIO_DRV_WritePinOutput(pinCS.pinName, 0);
-    EPD_Delay(5);
-#if HAS_RESET
-    GPIO_DRV_WritePinOutput(pinReset.pinName, 1);
-#endif
-    GPIO_DRV_WritePinOutput(pinCS.pinName, 1);
-    EPD_Delay(5);
-
     /* read the COG ID */
     uint8_t id = EPD_ReadCogID();
     if ((id & 0x0f) != 0x02) {
@@ -341,6 +327,11 @@ int EPD_Draw(const uint8_t *old_image, const uint8_t *new_image)
     EPD_WriteCommandByte(0x07, 0x01);
     EPD_Delay(50);
 
+    /* discharge external */
+    GPIO_DRV_WritePinOutput(pinDischarge.pinName, 1);
+    EPD_Delay(150);
+    GPIO_DRV_WritePinOutput(pinDischarge.pinName, 0);
+
 out:
     SPI_DRV_DmaMasterDeinit(1);
     return rc;