finally fixed bug in i2c address scan check routine

was checking if set instead of negated. oops.

firmware/retro_tech_fw/user/main.c

@@ -3,7 +3,8 @@
  * GAT Addon Firmware
  * by true
  *
- * version 0.0.2
+ * version 0.0.3
+ * Last Update 20240808
  *
  * code was made for different random addons I designed for dc32,
  * then adapted to each one. so things might be a mess.
@@ -85,7 +86,14 @@ void gpio_init()
     gpio.GPIO_Pin = GPIO_Pin_3 | GPIO_Pin_6;
     GPIO_Init(GPIOC, &gpio);
 
-    // BTN1, BTN2 will be handled by button handler
+    // BTN1 (PC5) pull up, BTN2 (PC4) pull down
+    gpio.GPIO_Pin = GPIO_Pin_4;
+    gpio.GPIO_Mode = GPIO_Mode_IPD;
+    GPIO_Init(GPIOC, &gpio);
+
+    gpio.GPIO_Pin = GPIO_Pin_5;
+    gpio.GPIO_Mode = GPIO_Mode_IPU;
+    GPIO_Init(GPIOC, &gpio);
 }
 
 int main(void)
@@ -102,7 +110,6 @@ int main(void)
 
     // configure gpio pins, hard buttons (used for settings reset)
     gpio_init();
-    btn_init();
 
     // get saved settings, or reset if BTN1 is pushed
     i2c_init();
@@ -110,6 +117,7 @@ int main(void)
 
     // configure hardware
     adc_init();
+    btn_init();
     led_init();
 
     // configure random

firmware/retro_tech_fw/user/src/btn.c

@@ -18,10 +18,10 @@ void btn_init()
 {
     uint8_t i;
 
-    // configure GPIO
-    BTN_PORT->BSHR   = (BTN1_PUPD << BTN1_PIN) | (BTN2_PUPD << BTN2_PIN);
-    BTN_PORT->CFGLR &= ~((0xf << (BTN1_PIN*4)) | ((0xf << (BTN2_PIN*4))));
-    BTN_PORT->CFGLR |=   (0x8 << (BTN1_PIN*4)) |  (0x8 << (BTN2_PIN*4));
+    // configure GPIO (now handled as part of main GPIO init function)
+    // BTN_PORT->BSHR   = (BTN1_PUPD << BTN1_PIN) | (BTN2_PUPD << BTN2_PIN);
+    // BTN_PORT->CFGLR &= ~((0xf << (BTN1_PIN*4)) | ((0xf << (BTN2_PIN*4))));
+    // BTN_PORT->CFGLR |=   (0x8 << (BTN1_PIN*4)) |  (0x8 << (BTN2_PIN*4));
 
     // configure default setup
     for (i = 0; i < BTN_COUNT; i++) {

firmware/retro_tech_fw/user/src/i2c.c

@@ -80,12 +80,10 @@ int8_t i2c_read_addr1b(uint8_t addr, uint8_t reg, uint8_t *data, uint8_t len)
 
        *data++ = I2C_ReceiveData(I2C1);
        len--;
-
-       if (!len) {
-           I2C_GenerateSTOP(I2C1, ENABLE);
-       }
     }
 
+    I2C_GenerateSTOP(I2C1, ENABLE);
+
     return 0;
 }
 
@@ -145,7 +143,7 @@ void i2c_write_reg_8b(uint8_t addr, uint8_t reg, const uint8_t dat)
     i2c_write_addr1b(addr, reg, &dat, 1);
 }
 
-uint8_t i2c_addr_scan(uint8_t addr)
+int8_t i2c_addr_scan(uint8_t addr)
 {
     uint8_t found = 1;
     uint32_t event;
@@ -164,30 +162,28 @@ uint8_t i2c_addr_scan(uint8_t addr)
     while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT) && timeout--);
     if (!timeout) return -2;
 
-    I2C_Send7bitAddress(I2C1, addr, (addr & 1));
+    I2C_Send7bitAddress(I2C1, (addr & 0xfe), (addr & 0x01));
     timeout = I2C_TIMEOUT_ACK_POLL;
     if (addr & 1) event = I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED;
     else          event = I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED;
 
-    while (I2C_CheckEvent(I2C1, event) && timeout--) {
+    while ((I2C_CheckEvent(I2C1, event) == NoREADY) && timeout--) {
         if (I2C_GetFlagStatus(I2C1, I2C_FLAG_AF)) {
             found = 0;
             break;
         }
-
     }
 
     if (!timeout) {
         found = 0;
     }
 
-    // reset flags; it might be in a fucked state
-    I2C1->STAR1 = 0;
-
     // send a stop to make sure anything listening knows to stfu
     I2C_GenerateSTOP(I2C1, ENABLE);
 
+    // reset flags; it might be in a fucked state
     if (!found) {
+        I2C1->STAR1 = 0;
         return 0;
     }
 

firmware/retro_tech_fw/user/src/i2c.h

@@ -19,7 +19,7 @@ int8_t i2c_write_addr1b(uint8_t addr, uint8_t reg, const uint8_t *data, uint8_t
 uint8_t i2c_read_reg_8b(uint8_t addr, uint8_t reg);
 void i2c_write_reg_8b(uint8_t addr, uint8_t reg, const uint8_t dat);
 
-uint8_t i2c_addr_scan(uint8_t addr);
+int8_t i2c_addr_scan(uint8_t addr);
 
 
 

firmware/retro_tech_fw/user/src/ui.c

@@ -324,12 +324,16 @@ static void ui_cursor_flash()
         case MODE_PROGRAM: {
             // cursor is on if this program is flagged as on
             cursor[0] = (userconf.ledprog_ena_mask & (1 << preview_idx)) ? 127 : 0;
+            cursor[1] = 0;
+            cursor[2] = 0;
 
             break;
         }
         case MODE_PARAMETER: {
             // cursor is on when program is being edited
             cursor[0] = rgb_prog_is_editing ? 127 : 0;
+            cursor[1] = 0;
+            cursor[2] = 0;
 
             break;
         }