diff --git a/src/uart-transmit/Makefile b/src/uart-transmit/Makefile
index 333c4d41aed88bd61ea6c6782508a2c9255846ef..1cabc439ec8717e71de36f741d00668386a3863b 100644
--- a/src/uart-transmit/Makefile
+++ b/src/uart-transmit/Makefile
@@ -1,3 +1,3 @@
-SOURCES = main.c
+SOURCES = main.c esp32-c3-uart-interface.c esp32-c3-led-helpers.c
include $(MDK)/$(ARCH)/build.mk
diff --git a/src/uart-transmit/esp32-c3-led-helpers.c b/src/uart-transmit/esp32-c3-led-helpers.c
new file mode 100644
index 0000000000000000000000000000000000000000..7195205c6b7476e572c07c80ed2779a9d7ea6e6d
--- /dev/null
+++ b/src/uart-transmit/esp32-c3-led-helpers.c
@@ -0,0 +1,31 @@
+#include "esp32-c3-led-helpers.h"
+#include <mdk.h>
+
+// used for debugging
+
+// On the ESP32C3 dev boards, the WS2812 LED is connected to GPIO 8
+static int ws_2812_pin = 8;
+
+void setupLED(){
+ wdt_disable();
+ gpio_output(ws_2812_pin);
+}
+
+void blinkGreen(int count, unsigned long delay_millis) {
+ uint8_t green[3] = {1, 0, 0}, black[3] = {0, 0, 0};
+ for (int i = 0; i < count; i++) {
+ ws2812_show(ws_2812_pin, green, sizeof(green));
+ delay_ms(delay_millis);
+ ws2812_show(ws_2812_pin, black, sizeof(black));
+ delay_ms(delay_millis);
+ }
+}
+
+void showColorForDuration(uint8_t grb[3], uint32_t durationInMs){
+ ws2812_show(ws_2812_pin, grb, sizeof(uint8_t)*3);
+ delay_ms(durationInMs);
+}
+
+void showColor(uint8_t grb[3]){
+ ws2812_show(ws_2812_pin, grb, sizeof(uint8_t)*3);
+}
\ No newline at end of file
diff --git a/src/uart-transmit/esp32-c3-led-helpers.h b/src/uart-transmit/esp32-c3-led-helpers.h
new file mode 100644
index 0000000000000000000000000000000000000000..d51f91a48d8a7d77cb84e852a4b6045c7b2bf9d5
--- /dev/null
+++ b/src/uart-transmit/esp32-c3-led-helpers.h
@@ -0,0 +1,9 @@
+#ifndef ESP32_C3_LED_HELPERS_H
+#define ESP32_C3_LED_HELPERS_H
+
+void showColorForDuration();
+void showColor();
+void blinkGreen();
+void setupLED();
+
+#endif
\ No newline at end of file
diff --git a/src/uart-transmit/esp32-c3-uart-interface.c b/src/uart-transmit/esp32-c3-uart-interface.c
index d9ffad59c311c410f79c131c132b0dee7cb50540..ba50bcf2ca86ee1d65151a70c3a3d35b2f056eef 100644
--- a/src/uart-transmit/esp32-c3-uart-interface.c
+++ b/src/uart-transmit/esp32-c3-uart-interface.c
@@ -1,9 +1,12 @@
#include "esp32-c3-uart-interface.h"
+#include "esp32-c3-led-helpers.h"
+#include <stdint.h>
+#include <stdbool.h>
static void clearBits(volatile uint32_t *registerAddress, uint32_t bitPositions, uint32_t numBits) {
- uint32_t mask = (uint32_t)(1 << numBits) - 1;
- mask <<= bitPositions;
- *registerAddress &= ~mask;
+ uint32_t mask = (uint32_t)(1 << numBits) - 1; // Create a mask with the specified number of bits set to 1
+ mask <<= bitPositions; // Shift the mask to the correct bit positions
+ *registerAddress &= ~mask; // Clear the bits in the register using bitwise AND with the inverse of the mask
}
static void setBit(volatile uint32_t *registerAddress, uint32_t bitPositions) {
@@ -110,14 +113,12 @@ static void set_max_data_lenght(){
}
void config_uart(){
- printf("Try to config %d\n", 1);
// wait for UART_REG_UART0_UPDATE to become 0, which indicates the completion of the last synchronization;
uint32_t reg_update = *C3_UART_ID_REG_UART0;
- if ((bool)(reg_update & (uint32_t)(1<<31))){
- return;
- }
- printf("Ready to config %d\n", 1);
+ while((bool)(reg_update & (uint32_t)(1<<31))){
+ __asm__("ADDI x0, x0, 0");
+ }
// configure static registers (if any) following Section 26.5.1.2;
@@ -156,10 +157,10 @@ void enable_uart_transmitter(){
set_65_to_rd_byte();
// clear UART_TXFIFO_EMPTY_INT interrupt by setting UART_TXFIFO_EMPTY_INT_CLR;
- setBit(C3_UART_INT_CLR_REG_UART0, 1)
+ setBit(C3_UART_INT_CLR_REG_UART0, 1);
// enable UART_TXFIFO_EMPTY_INT interrupt by setting UART_TXFIFO_EMPTY_INT_ENA;
- setBit(C3_UART_INT_ENA_REG_UART0, 1)
+ setBit(C3_UART_INT_ENA_REG_UART0, 1);
// detect UART_TXFIFO_EMPTY_INT and wait for the completion of data transmission.
}
@@ -171,8 +172,16 @@ void reset_uart(){
}
void init_uart(){
+ uint8_t red[3] = {0,1,0};
+ uint8_t blue[3] = {0,0,1};
+ uint8_t yellow[3] = {1,1,0};
+ uint8_t violet[3] = {0,1,1};
// from technical reference manual 543 f
+ showColorForDuration(red,1000);
init_uart_enable_clk();
+ showColorForDuration(blue,1000);
init_uart_toggle_rst();
+ showColorForDuration(violet,1000);
init_uart_clear_update();
+ showColorForDuration(yellow,1000);
}
\ No newline at end of file
diff --git a/src/uart-transmit/esp32-c3-uart-interface.h b/src/uart-transmit/esp32-c3-uart-interface.h
index 29b02d2cc1f3de6e844a828179ffb7bebd0b8ba1..7dfe002d3fb0292099c0833d2109bd55b9ae8466 100644
--- a/src/uart-transmit/esp32-c3-uart-interface.h
+++ b/src/uart-transmit/esp32-c3-uart-interface.h
@@ -19,7 +19,7 @@
#define C3_UART_INT_CLR_REG_UART0 ((volatile uint32_t *)C3_BASE_OFFSET_UART_CONTROLLER_0+0x0010)
#define C3_UART_INT_CLR_REG_UART1 ((volatile uint32_t *)C3_BASE_OFFSET_UART_CONTROLLER_1+0x0010)
-// UART_TXFIFO_EMPTY_INT_CLR is on 1
+// UART_TXFIFO_EMPTY_INT_CLR
#define C3_SYSTEM_PERIP_CLK_EN0_REG ((volatile uint32_t *)C3_BASE_OFFSET_SYSTEM_REGISTERS+0x0010)
// SYSTEM_UART_MEM_CLK_EN is on 24
diff --git a/src/uart-transmit/main.c b/src/uart-transmit/main.c
index c249ba76bbd1d9dd018e601a347e545a9bfe2252..937885a419b2931e55a3c56c108d490b00fe9f5f 100644
--- a/src/uart-transmit/main.c
+++ b/src/uart-transmit/main.c
@@ -2,57 +2,21 @@
// All rights reserved
#include <mdk.h>
-#include "esp32-c3-uart-interface.c"
-
-// On the ESP32C3 dev boards, the WS2812 LED is connected to GPIO 8
-static int ws_2812_pin = 8;
-
-// Simple hue function for generation of smooth rainbow.
-static uint8_t hueval(int value) {
- value = value % 1536;
- if (value < 256) {
- return (uint8_t) value;
- } else if (value < 768) {
- return 255;
- } else if (value < 1024) {
- return (uint8_t) (1023 - value);
- } else {
- return 0;
- }
-}
-
-static void blink(int count, unsigned long delay_millis) {
- uint8_t green[3] = {1, 0, 0}, black[3] = {0, 0, 0};
- for (int i = 0; i < count; i++) {
- ws2812_show(ws_2812_pin, green, sizeof(green));
- delay_ms(delay_millis);
- ws2812_show(ws_2812_pin, black, sizeof(black));
- delay_ms(delay_millis);
- }
-}
-
-static void rainbow(int count) {
- for (int i = 0; i < count; i++) {
- uint8_t val = hueval(i);
- val = (uint8_t) (val/100);
- uint8_t rgb[3] = {0, val, val};
- ws2812_show(ws_2812_pin, rgb, sizeof(rgb));
- delay_ms(1);
- }
-}
+#include "esp32-c3-uart-interface.h"
+#include "esp32-c3-led-helpers.h"
int main(void) {
- wdt_disable();
- gpio_output(ws_2812_pin);
+ uint8_t green[3] = {1,0,0};
+ uint8_t black[3] = {0,0,0};
+ setupLED();
+ showColor(black);
+ // for some reason the first time we show a color, it's always a bright green...
+ showColorForDuration(green,1000);
+
init_uart();
config_uart();
- uint8_t cycle = 0;
- for (;;) {
- printf("Cycle %d\n", cycle++);
- blink(2, 200);
- rainbow(2500);
- }
+ showColor(black);
return 0;
}