Mirror/Momentum-Firmware
1
0
Fork 0
mirror of https://github.com/Next-Flip/Momentum-Firmware.git synced 2026-04-24 03:29:57 -07:00
Code Issues Packages Projects Releases Wiki Activity

add comments back

Browse Source
This commit is contained in:
MX
2026-01-26 14:32:10 +03:00
parent dfb17ab428
commit 7e85168495
2 changed files with 56 additions and 33 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
applications/drivers/subghz/cc1101_ext/cc1101_ext.c
View File

@@ -794,12 +794,17 @@ bool subghz_device_cc1101_ext_start_async_tx(SubGhzDeviceCC1101ExtCallback callb
subghz_device_cc1101_ext->async_tx.buffer =
malloc(SUBGHZ_DEVICE_CC1101_EXT_ASYNC_TX_BUFFER_FULL * sizeof(uint32_t));
// here we do the same things as in /unleashed-firmware/targets/f7/furi_hal/furi_hal_subghz.c
// use first DMA to update timer TIM17 durations, but TIM17 have not output chanel
// so we use second DMA to transfer data from gpio_tx_buff directly to gpio pin using BSSR.
// BSSR allow us tranfer data directly to pin in gpio port.
//Signal generation with mem-to-mem DMA
furi_hal_gpio_write(subghz_device_cc1101_ext->g0_pin, false);
furi_hal_gpio_init(
subghz_device_cc1101_ext->g0_pin, GpioModeOutputPushPull, GpioPullNo, GpioSpeedVeryHigh);
// Configure DMA update timer
// Configure DMA to update timer TIM17 ARR by durations from buffer
LL_DMA_SetMemoryAddress(
SUBGHZ_DEVICE_CC1101_EXT_DMA_CH3_DEF, (uint32_t)subghz_device_cc1101_ext->async_tx.buffer);
LL_DMA_SetPeriphAddress(SUBGHZ_DEVICE_CC1101_EXT_DMA_CH3_DEF, (uint32_t) & (TIM17->ARR));
@@ -821,7 +826,7 @@ bool subghz_device_cc1101_ext_start_async_tx(SubGhzDeviceCC1101ExtCallback callb
furi_hal_bus_enable(FuriHalBusTIM17);
// Configure TIM
// Configure TIM 17
// Set the timer resolution to 2 us
LL_TIM_SetCounterMode(TIM17, LL_TIM_COUNTERMODE_UP);
LL_TIM_SetClockDivision(TIM17, LL_TIM_CLOCKDIVISION_DIV1);
@@ -835,7 +840,7 @@ bool subghz_device_cc1101_ext_start_async_tx(SubGhzDeviceCC1101ExtCallback callb
subghz_device_cc1101_ext_async_tx_refill(
subghz_device_cc1101_ext->async_tx.buffer, SUBGHZ_DEVICE_CC1101_EXT_ASYNC_TX_BUFFER_FULL);
// Configure tx gpio dma
// Configure DMA to transfer data from gpio_tx_buff directly to gpio pin using BSSR
const GpioPin* gpio = subghz_device_cc1101_ext->g0_pin;
subghz_device_cc1101_ext->async_tx.gpio_tx_buff[0] = (uint32_t)gpio->pin << GPIO_NUMBER;