diff options
| author | Keith Packard <keithp@keithp.com> | 2016-11-20 00:04:27 -0800 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2016-11-20 00:04:27 -0800 |
| commit | e6518cf1ddfc087ca25fa1494f993ce03e43e138 (patch) | |
| tree | 8351ae428fcfcc70c210803eba8bc4fb912b8302 /src/stm/ao_timer.c | |
| parent | 86f1c4b04946956f40755286bd9554828d5c8728 (diff) | |
altos/stm-vga: Implement VGA out from the STM processor
Generates vsync/hsync using timers and pixel data using the SPI port.
320x240 video using 640x480 mode and a 24MHz "pixel" clock.
Includes the beginings of rendering code for the frame buffer,
including bitblt, solid fill and text with a 5x7 font.
Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'src/stm/ao_timer.c')
| -rw-r--r-- | src/stm/ao_timer.c | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/src/stm/ao_timer.c b/src/stm/ao_timer.c index f86a5116..b25dbd1a 100644 --- a/src/stm/ao_timer.c +++ b/src/stm/ao_timer.c @@ -42,31 +42,30 @@ volatile __data uint8_t ao_data_count; void stm_systick_isr(void) { + ao_arch_release_interrupts(); ao_validate_cur_stack(); - if (stm_systick.csr & (1 << STM_SYSTICK_CSR_COUNTFLAG)) { - ++ao_tick_count; + ++ao_tick_count; #if HAS_TASK_QUEUE - if (ao_task_alarm_tick && (int16_t) (ao_tick_count - ao_task_alarm_tick) >= 0) - ao_task_check_alarm((uint16_t) ao_tick_count); + if (ao_task_alarm_tick && (int16_t) (ao_tick_count - ao_task_alarm_tick) >= 0) + ao_task_check_alarm((uint16_t) ao_tick_count); #endif #if AO_DATA_ALL - if (++ao_data_count == ao_data_interval) { - ao_data_count = 0; + if (++ao_data_count == ao_data_interval) { + ao_data_count = 0; #if HAS_FAKE_FLIGHT - if (ao_fake_flight_active) - ao_fake_flight_poll(); - else + if (ao_fake_flight_active) + ao_fake_flight_poll(); + else #endif - ao_adc_poll(); + ao_adc_poll(); #if (AO_DATA_ALL & ~(AO_DATA_ADC)) - ao_wakeup((void *) &ao_data_count); + ao_wakeup((void *) &ao_data_count); #endif - } + } #endif #ifdef AO_TIMER_HOOK - AO_TIMER_HOOK; + AO_TIMER_HOOK; #endif - } } #if HAS_ADC @@ -90,6 +89,7 @@ ao_timer_init(void) stm_systick.csr = ((1 << STM_SYSTICK_CSR_ENABLE) | (1 << STM_SYSTICK_CSR_TICKINT) | (STM_SYSTICK_CSR_CLKSOURCE_HCLK_8 << STM_SYSTICK_CSR_CLKSOURCE)); + stm_nvic.shpr15_12 |= 0xff << 24; } #endif |