minor cleanup, add i2c single register read/write functions

code/firmware/user/src/i2c.h

@@ -1,26 +0,0 @@
-/*
- * i2c.h
- *
- *  Created on: Jul 27, 2024
- *      Author: true
- */
-
-#ifndef USER_SRC_I2C_H_
-#define USER_SRC_I2C_H_
-
-
-
-#include <stdint.h>
-
-
-
-void i2c_init();
-
-void i2c_read_addr1b(uint8_t devaddr, uint8_t addr, uint8_t *data, uint8_t len);
-void i2c_write_addr1b(uint8_t devaddr, uint8_t addr, uint8_t *data, uint8_t len);
-
-int8_t i2c_ack_poll(uint8_t devaddr);
-
-
-
-#endif /* USER_SRC_I2C_H_ */

code/retro_tech_fw/.settings/org.eclipse.core.resources.prefs

@@ -8,6 +8,7 @@ encoding//periph/inc/ch32v00x_pwr.h=GBK
 encoding//periph/inc/ch32v00x_rcc.h=GBK
 encoding//periph/src/ch32v00x_adc.c=GBK
 encoding//periph/src/ch32v00x_dbgmcu.c=GBK
+encoding//periph/src/ch32v00x_flash.c=GBK
 encoding//periph/src/ch32v00x_gpio.c=GBK
 encoding//periph/src/ch32v00x_i2c.c=GBK
 encoding//periph/src/ch32v00x_misc.c=GBK
@@ -42,3 +43,4 @@ encoding//user/src/ui.h=GBK
 encoding//user/system_ch32v00x.c=GBK
 encoding//user/system_ch32v00x.h=UTF-8
 encoding/CH32V003F4P6.launch=GBK
+encoding/retro_tech_fw.launch=GBK

code/retro_tech_fw/user/ch32v00x_it.c

@@ -51,7 +51,7 @@ void HardFault_Handler(void)
 volatile uint16_t ticnt;
 volatile uint32_t uptime;
 
-void SysTick_Handler()
+void SysTick_Handler(void)
 {
     if (++ticnt > 0x7ff) {
         ticnt = 0;
@@ -81,5 +81,3 @@ void SysTick_Handler()
 
     return;
 }
-
-

code/retro_tech_fw/user/ch32v00x_it.h

@@ -22,6 +22,5 @@ extern volatile uint16_t ticnt;
 extern volatile uint32_t uptime;
 
 
+
 #endif /* __CH32V00x_IT_H */
-
-

code/retro_tech_fw/user/main.c

@@ -30,7 +30,7 @@
 
 void systick_init(void)
 {
-    SysTick->CMP = (SystemCoreClock / 2000) - 1;    // we want a 2KHz interrupt
+    SysTick->CMP = (SystemCoreClock / 2048) - 1;    // we want a 2048Hz interrupt
     SysTick->CNT = 0;                               // clear counter
     SysTick->CTLR = 0xF;                            // start counter in /1 mode, enable interrupts, auto-reset counter
     SysTick->SR = 0;                                // clear count comparison flag

code/retro_tech_fw/user/src/i2c.c

@@ -4,11 +4,11 @@
  * routines more or less copied from WCH example code, then fucked around with to work.
  *
  * these routines have serious issues.
- * - any i2c issue will lock up the machine, and there's no timeout handlers
+ * - any i2c issue may lock up the machine.
+ * - timeout handlers are hastily added and may have problems.
  * - there's no error handling of any kind
  * - the library code makes some serious assumptions re: flags
- *
- * this MUST be fixed before con.
+ * - it's a shitpile of polling
  */
 
 #include <ch32v00x.h>
@@ -43,9 +43,9 @@ void i2c_init()
 }
 
 /*
- * reads data from devices which use a single-byte address
+ * reads data from devices which use a single-byte address register
  */
-int8_t i2c_read_addr1b(uint8_t devaddr, uint8_t addr, uint8_t *data, uint8_t len)
+int8_t i2c_read_addr1b(uint8_t addr, uint8_t reg, uint8_t *data, uint8_t len)
 {
     timeout = I2C_TIMEOUT;
     while((I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY) != RESET) && timeout--);
@@ -56,12 +56,12 @@ int8_t i2c_read_addr1b(uint8_t devaddr, uint8_t addr, uint8_t *data, uint8_t len
     while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT) && timeout--);
     if (!timeout) return -2;
 
-    I2C_Send7bitAddress(I2C1, devaddr, I2C_Direction_Transmitter);
+    I2C_Send7bitAddress(I2C1, addr, I2C_Direction_Transmitter);
     timeout = I2C_TIMEOUT;
     while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED) && timeout--);
     if (!timeout) return -3;
 
-    I2C_SendData(I2C1, addr);
+    I2C_SendData(I2C1, reg);
     timeout = I2C_TIMEOUT;
     while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED) && timeout--);
     if (!timeout) return -4;
@@ -71,7 +71,7 @@ int8_t i2c_read_addr1b(uint8_t devaddr, uint8_t addr, uint8_t *data, uint8_t len
     while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT) && timeout--);
     if (!timeout) return -5;
 
-    I2C_Send7bitAddress(I2C1, devaddr, I2C_Direction_Receiver);
+    I2C_Send7bitAddress(I2C1, addr, I2C_Direction_Receiver);
     timeout = I2C_TIMEOUT;
     while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED) && timeout--);
     if (!timeout) return -6;
@@ -92,7 +92,15 @@ int8_t i2c_read_addr1b(uint8_t devaddr, uint8_t addr, uint8_t *data, uint8_t len
     return 0;
 }
 
-int8_t i2c_write_addr1b(uint8_t devaddr, uint8_t addr, uint8_t *data, uint8_t len)
+uint8_t i2c_read_reg_8b(uint8_t addr, uint8_t reg)
+{
+    uint8_t dat;
+
+    i2c_read_addr1b(addr, reg, &dat, 1);
+    return dat;
+}
+
+int8_t i2c_write_addr1b(uint8_t addr, uint8_t reg, uint8_t *data, uint8_t len)
 {
     timeout = I2C_TIMEOUT;
     while((I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY) != RESET) && timeout--);
@@ -103,12 +111,12 @@ int8_t i2c_write_addr1b(uint8_t devaddr, uint8_t addr, uint8_t *data, uint8_t le
     while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT) && timeout--);
     if (!timeout) return -2;
 
-    I2C_Send7bitAddress(I2C1, devaddr, I2C_Direction_Transmitter);
+    I2C_Send7bitAddress(I2C1, addr, I2C_Direction_Transmitter);
     timeout = I2C_TIMEOUT;
     while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED) && timeout--);
     if (!timeout) return -3;
 
-    I2C_SendData(I2C1, addr);
+    I2C_SendData(I2C1, reg);
     timeout = I2C_TIMEOUT;
     while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED) && timeout--);
     if (!timeout) return -4;
@@ -126,7 +134,12 @@ int8_t i2c_write_addr1b(uint8_t devaddr, uint8_t addr, uint8_t *data, uint8_t le
     return 0;
 }
 
-int8_t i2c_ack_poll(uint8_t devaddr)
+void i2c_write_reg_8b(uint8_t addr, uint8_t reg, uint8_t dat)
+{
+    i2c_write_addr1b(addr, reg, &dat, 1);
+}
+
+int8_t i2c_ack_poll(uint8_t addr)
 {
     int8_t addr_match = 0;
 
@@ -139,7 +152,7 @@ int8_t i2c_ack_poll(uint8_t devaddr)
     while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT) && timeout--);
     if (!timeout) return -2;
 
-    I2C_Send7bitAddress(I2C1, devaddr, I2C_Direction_Receiver);
+    I2C_Send7bitAddress(I2C1, addr, I2C_Direction_Receiver);
     timeout = I2C_TIMEOUT_ACK_POLL;
     while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED) && timeout--);
     if (!timeout) {

code/retro_tech_fw/user/src/i2c.h

@@ -0,0 +1,26 @@
+/*
+ * Created on: Jul 27, 2024
+ */
+
+#ifndef USER_SRC_I2C_H_
+#define USER_SRC_I2C_H_
+
+
+
+#include <stdint.h>
+
+
+
+void i2c_init();
+
+int8_t i2c_read_addr1b(uint8_t addr, uint8_t reg, uint8_t *data, uint8_t len);
+int8_t i2c_write_addr1b(uint8_t addr, uint8_t reg, uint8_t *data, uint8_t len);
+
+uint8_t i2c_read_reg_8b(uint8_t addr, uint8_t reg);
+void i2c_write_reg_8b(uint8_t addr, uint8_t reg, uint8_t dat);
+
+int8_t i2c_ack_poll(uint8_t devaddr);
+
+
+
+#endif /* USER_SRC_I2C_H_ */

code/retro_tech_fw/user/src/led.c

@@ -6,8 +6,8 @@
 
 
 #define FL3729_CS_OUTPUTS   15
-#define LED_INIT_CURRENT    0
 
+#define LED_INIT_CURRENT    0
 #define LED_INIT_SCALING    0xff