Fix pins initialization (avoid modifying bits other than really needed)

grafalex82 · grafalex82 · commit 27c0eaf008fb · 2019-06-01T18:10:13.000+03:00
diff --git a/hardware.c b/hardware.c
@@ -152,7 +152,7 @@ void setupLEDAndButton (void) {
     // SET_REG(AFIO_MAPR,(GET_REG(AFIO_MAPR) & ~AFIO_MAPR_SWJ_CFG) | AFIO_MAPR_SWJ_CFG_NO_JTAG_NO_SW);// Try to disable SWD AND JTAG so we can use those pins (not sure if this works).
 
 #if defined(BUTTON_BANK) && defined (BUTTON_PIN) && defined (BUTTON_PRESSED_STATE)
-    SET_REG(GPIO_CR(BUTTON_BANK,BUTTON_PIN),(GPIO_CR(BUTTON_BANK,BUTTON_PIN) & crMask(BUTTON_PIN)) | BUTTON_INPUT_MODE << CR_SHITF(BUTTON_PIN));
+    SET_REG(GPIO_CR(BUTTON_BANK,BUTTON_PIN),(GET_REG(GPIO_CR(BUTTON_BANK,BUTTON_PIN)) & crMask(BUTTON_PIN)) | BUTTON_INPUT_MODE << CR_SHITF(BUTTON_PIN));
 
     gpio_write_bit(BUTTON_BANK, BUTTON_PIN,1-BUTTON_PRESSED_STATE);// set pulldown resistor in case there is no button.
 #endif
