diff options
Diffstat (limited to 'examples/vga.cpp')
| -rw-r--r-- | examples/vga.cpp | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/examples/vga.cpp b/examples/vga.cpp new file mode 100644 index 0000000..c2e61ae --- /dev/null +++ b/examples/vga.cpp @@ -0,0 +1,262 @@ + +#include "wirish.h" + +/* +D5 PB6 - TIM4_CH1 I2C1_SCL - - Y +D6 PA8 - TIM1_CH1 - USART1_CK - Y +D7 PA9 - TIM1_CH2 - USART1_TX - Y +D8 PA10 - TIM1_CH3 - USART1_RX - Y +D9 PB7 - TIM4_CH2 I2C1_SDA - - Y +*/ + +//gpio_write_bit(GPIOB_BASE, 6, 1); // VGA_R +//gpio_write_bit(GPIOB_BASE, 6, 0); + +//(GPIOA_BASE)->BSRR = BIT(8); +//asm volatile("nop"); +//(GPIOA_BASE)->BRR = BIT(8); +/* + gpio_write_bit(GPIOB_BASE, 6, 1); // VGA_R + gpio_write_bit(GPIOB_BASE, 6, 0); + gpio_write_bit(GPIOA_BASE, 8, 1); // VGA_G + gpio_write_bit(GPIOA_BASE, 8, 0); + gpio_write_bit(GPIOA_BASE, 9, 1); // VGA_B + gpio_write_bit(GPIOA_BASE, 9, 0); + gpio_write_bit(GPIOA_BASE, 10, 1); // VGA_V + gpio_write_bit(GPIOA_BASE, 10, 0); + gpio_write_bit(GPIOB_BASE, 7, 1); // VGA_H + gpio_write_bit(GPIOB_BASE, 7, 0); +*/ + +#define LED_PIN 13 +#define VGA_R 5 // B6 +#define VGA_G 6 // A8 +#define VGA_B 7 // A9 +#define VGA_V 11 // A6 +#define VGA_H 12 // A7 +#define VGA_R_HIGH (GPIOB_BASE)->BSRR = BIT(6) +#define VGA_R_LOW (GPIOB_BASE)->BRR = BIT(6) +#define VGA_G_HIGH (GPIOA_BASE)->BSRR = BIT(8) +#define VGA_G_LOW (GPIOA_BASE)->BRR = BIT(8) +#define VGA_B_HIGH (GPIOA_BASE)->BSRR = BIT(9) +#define VGA_B_LOW (GPIOA_BASE)->BRR = BIT(9) +#define VGA_V_HIGH (GPIOA_BASE)->BSRR = BIT(6) +#define VGA_V_LOW (GPIOA_BASE)->BRR = BIT(6) +#define VGA_H_HIGH (GPIOA_BASE)->BSRR = BIT(7) +#define VGA_H_LOW (GPIOA_BASE)->BRR = BIT(7) + +void isr_porch(void); +void isr_start(void); +void isr_stop(void); +void isr_update(void); + +void setup() +{ + pinMode(LED_PIN, OUTPUT); + digitalWrite(LED_PIN, 1); + pinMode(VGA_R, OUTPUT); + pinMode(VGA_G, OUTPUT); + pinMode(VGA_B, OUTPUT); + pinMode(VGA_V, OUTPUT); + pinMode(VGA_H, OUTPUT); + + /* Send a message out USART2 */ + Serial2.begin(9600); + Serial2.println("Video time..."); + + + digitalWrite(VGA_R, 0); + digitalWrite(VGA_G, 0); + digitalWrite(VGA_B, 0); + digitalWrite(VGA_H,1); + digitalWrite(VGA_V,1); + + timer_set_prescaler(4,0); + timer_set_mode(4, 1, TIMER_OUTPUTCOMPARE); + timer_set_mode(4, 2, TIMER_OUTPUTCOMPARE); + timer_set_mode(4, 3, TIMER_OUTPUTCOMPARE); + timer_set_mode(4, 4, TIMER_OUTPUTCOMPARE); + timer_set_reload(4, 2287); + timer_set_compare_value(4,1,200); + timer_set_compare_value(4,2,300); + timer_set_compare_value(4,3,2170); // 2219 max... + timer_set_compare_value(4,4,1); + timer_attach_interrupt(4,1,isr_porch); + timer_attach_interrupt(4,2,isr_start); + timer_attach_interrupt(4,3,isr_stop); + timer_attach_interrupt(4,4,isr_update); + + timer_set_count(4,0); +} + +int toggle = 0; +uint16 x = 0; +uint16 y = 0; +uint8 v_active = 1; +GPIO_Port *portb = GPIOB_BASE; + +void isr_porch(void) { + VGA_H_HIGH; + y++; + if(y>=523) { + y=1; + v_active = 1; + return; + } + if(y>=492) { + VGA_V_HIGH; + return; + } + if(y>=490) { + VGA_V_LOW; + return; + } + if(y>=479) { // 479 + v_active = 0; + return; + } +} + +uint8 logo[18][16] = { + {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,}, + {0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,}, + {0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,}, + {0,0,0,0,1,0,0,1,0,0,1,0,0,0,0,0,}, + {0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,0,}, + {0,0,1,0,0,0,0,1,0,0,0,0,1,0,0,0,}, + {0,0,1,0,0,1,0,1,0,1,0,0,1,0,0,0,}, + {0,1,0,0,0,0,1,1,1,0,0,0,0,1,0,0,}, + {0,1,0,1,0,0,0,1,0,0,0,1,0,1,0,0,}, + {1,0,0,0,1,0,0,1,0,0,1,0,0,0,1,0,}, + {1,0,0,0,0,1,0,1,0,1,0,0,0,0,1,0,}, + {1,0,0,0,0,0,1,1,1,0,0,0,0,0,1,0,}, + {0,1,0,0,0,0,0,1,0,0,0,0,0,1,0,0,}, + {0,0,1,1,0,0,0,1,0,0,0,1,1,0,0,0,}, + {0,0,0,0,1,1,1,0,1,1,1,0,0,0,0,0,}, + {0,0,0,0,0,0,1,0,1,0,0,0,0,0,0,0,}, + {0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,}, + {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,}, }; + +void isr_start(void) { + if(!v_active) { return; } + VGA_R_HIGH; + //delayMicroseconds(2); + //gpio_write_bit(GPIOA_BASE, 8, 1); // VGA_G + for(x=0; x<32; x++) { + if(logo[y/28][x/2]) { + VGA_G_HIGH; + VGA_B_HIGH; + } else { + VGA_G_LOW; + VGA_B_LOW; + } + } + +} +void isr_stop(void) { + if(!v_active) { return; } + VGA_R_LOW; + VGA_G_LOW; + VGA_B_LOW; +} +void isr_update(void) { + VGA_H_LOW; +} + +void loop() { + /* + toggle ^= 1; + digitalWrite(LED_PIN, toggle); + delay(100); + Serial2.println("HIHIHI!"); + */ + //for(y=0; y<480; y++) { + /* + for(y=0; y<160; y++) { + VGA_R_LOW; + VGA_H_LOW; + delayMicroseconds(3); + VGA_H_HIGH; + VGA_R_HIGH; + delayMicroseconds(8); + VGA_G_HIGH; + delayMicroseconds(10); + VGA_B_HIGH; + delayMicroseconds(10); + VGA_R_LOW; + VGA_B_LOW; + VGA_G_LOW; + //VGA_G_HIGH; + } + for(y=0; y<160; y++) { + VGA_R_LOW; + VGA_H_LOW; + delayMicroseconds(3); + VGA_H_HIGH; + VGA_G_HIGH; + delayMicroseconds(8); + VGA_R_HIGH; + delayMicroseconds(10); + VGA_B_HIGH; + delayMicroseconds(10); + VGA_R_LOW; + VGA_B_LOW; + VGA_G_LOW; + //VGA_G_HIGH; + } + for(y=0; y<160; y++) { + VGA_R_LOW; + VGA_H_LOW; + delayMicroseconds(3); + VGA_H_HIGH; + VGA_B_HIGH; + delayMicroseconds(8); + VGA_G_HIGH; + delayMicroseconds(10); + VGA_R_HIGH; + delayMicroseconds(10); + VGA_R_LOW; + VGA_B_LOW; + VGA_G_LOW; + //VGA_G_HIGH; + } + for(y=0; y<11; y++) { + VGA_R_LOW; + VGA_H_LOW; + delayMicroseconds(3); + VGA_R_LOW; + VGA_H_HIGH; + delayMicroseconds(28); + } + VGA_V_LOW; + for(y=0; y<2; y++) { + VGA_R_LOW; + VGA_H_LOW; + delayMicroseconds(3); + VGA_R_LOW; + VGA_H_HIGH; + delayMicroseconds(28); + } + VGA_V_HIGH; + for(y=0; y<30; y++) { + VGA_R_LOW; + VGA_H_LOW; + delayMicroseconds(3); + VGA_R_LOW; + VGA_H_HIGH; + delayMicroseconds(28); + } + */ + +} + + +int main(void) { + init(); + setup(); + + while (1) { + loop(); + } + return 0; +} |