diff options
Diffstat (limited to 'stmhal/lcd.c')
| -rw-r--r-- | stmhal/lcd.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/stmhal/lcd.c b/stmhal/lcd.c index d2db7b7ba1..c5952fa48c 100644 --- a/stmhal/lcd.c +++ b/stmhal/lcd.c @@ -1,3 +1,4 @@ +#include <stdio.h> #include <string.h> #include <stm32f4xx_hal.h> @@ -59,8 +60,12 @@ #define LCD_INSTR (0) #define LCD_DATA (1) +static void lcd_delay(void) { + __asm volatile ("nop\nnop"); +} + static void lcd_out(int instr_data, uint8_t i) { - HAL_Delay(0); + lcd_delay(); PYB_LCD_PORT->BSRRH = PYB_LCD_CS1_PIN; // CS=0; enable if (instr_data == LCD_INSTR) { PYB_LCD_PORT->BSRRH = PYB_LCD_A0_PIN; // A0=0; select instr reg @@ -69,7 +74,7 @@ static void lcd_out(int instr_data, uint8_t i) { } // send byte bigendian, latches on rising clock for (uint32_t n = 0; n < 8; n++) { - HAL_Delay(0); + lcd_delay(); PYB_LCD_PORT->BSRRH = PYB_LCD_SCL_PIN; // SCL=0 if ((i & 0x80) == 0) { PYB_LCD_PORT->BSRRH = PYB_LCD_SI_PIN; // SI=0 @@ -77,7 +82,7 @@ static void lcd_out(int instr_data, uint8_t i) { PYB_LCD_PORT->BSRRL = PYB_LCD_SI_PIN; // SI=1 } i <<= 1; - HAL_Delay(0); + lcd_delay(); PYB_LCD_PORT->BSRRL = PYB_LCD_SCL_PIN; // SCL=1 } PYB_LCD_PORT->BSRRL = PYB_LCD_CS1_PIN; // CS=1; disable |