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stm32/subghz: Add STM32WL55 subghz radio interface to stm module.
This is the minimum C interface to allow a modem driver to be built in Python. Interface is simple, with the intention that the micropython-lib driver is the main (only) consumer of it. Signed-off-by: Angus Gratton <angus@redyak.com.au>
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@@ -355,6 +355,7 @@ SRC_C += \ | |
dac.c \ | ||
adc.c \ | ||
sdio.c \ | ||
subghz.c \ | ||
$(wildcard $(BOARD_DIR)/*.c) | ||
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SRC_O += \ | ||
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@@ -34,9 +34,9 @@ | |
,PC0 | ||
,PC1 | ||
,PC2 | ||
,PC3 | ||
,PC4 | ||
,PC5 | ||
FE_CTRL3,PC3 | ||
FE_CTRL1,PC4 | ||
FE_CTRL2,PC5 | ||
,PC6 | ||
SW,PA0 | ||
SW1,PA0 | ||
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/* | ||
* This file is part of the MicroPython project, http://micropython.org/ | ||
* | ||
* The MIT License (MIT) | ||
* | ||
* Copyright (c) 2023 Angus Gratton | ||
* | ||
* Permission is hereby granted, free of charge, to any person obtaining a copy | ||
* of this software and associated documentation files (the "Software"), to deal | ||
* in the Software without restriction, including without limitation the rights | ||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
* copies of the Software, and to permit persons to whom the Software is | ||
* furnished to do so, subject to the following conditions: | ||
* | ||
* The above copyright notice and this permission notice shall be included in | ||
* all copies or substantial portions of the Software. | ||
* | ||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
* THE SOFTWARE. | ||
*/ | ||
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#include "py/gc.h" | ||
#include "py/runtime.h" | ||
#include "subghz.h" | ||
#include "irq.h" | ||
#include "spi.h" | ||
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#if defined(STM32WL) | ||
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// Interface to the STM32WL series "SUBGHZ Radio" module | ||
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STATIC void handle_radio_irq() { | ||
// Level-triggered interrupts means the interrupt has to be cleared before | ||
// this function returns. | ||
// | ||
// Rather than writing to SUBGHZ SPI in Interrupt Context to clear the | ||
// interrupt, disable the IRQ and rely on Python code to call | ||
// subghz_irq(handler) to re-enable when needed. | ||
HAL_NVIC_DisableIRQ(SUBGHZ_Radio_IRQn); | ||
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mp_obj_t callback = MP_STATE_PORT(subghz_callback); | ||
if (callback != mp_const_none) { | ||
mp_sched_lock(); | ||
gc_lock(); | ||
// Passing dummy 'pin' argument of None, to keep | ||
// compatibility with machine.Pin.isr() handlers | ||
mp_call_function_1_protected(callback, mp_const_none); | ||
gc_unlock(); | ||
mp_sched_unlock(); | ||
} | ||
} | ||
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void SUBGHZ_Radio_IRQHandler(void) { | ||
IRQ_ENTER(SUBGHZ_Radio_IRQn); | ||
handle_radio_irq(); | ||
IRQ_EXIT(SUBGHZ_Radio_IRQn); | ||
} | ||
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void subghz_init(void) { | ||
__HAL_RCC_SUBGHZ_RADIO_FORCE_RESET(); | ||
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#if !MICROPY_HW_CLK_USE_HSE && MICROPY_HW_CLK_USE_BYPASS | ||
// SUBGHZ clock source is HSE oscillator. | ||
// | ||
// If this is not already enabled for the system clock, and we're depending | ||
// on the VDDTCXO pin to power the HSE ("bypass mode"), then enable it. | ||
__HAL_RCC_HSE_CONFIG(RCC_HSE_BYPASS_PWR); | ||
#endif | ||
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NVIC_DisableIRQ(SUBGHZ_Radio_IRQn); | ||
NVIC_SetPriority(SUBGHZ_Radio_IRQn, IRQ_PRI_SUBGHZ_RADIO); | ||
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__HAL_RCC_SUBGHZ_RADIO_RELEASE_RESET(); | ||
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while (__HAL_RCC_GET_FLAG(RCC_FLAG_RFRST) != 0) { | ||
} | ||
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MP_STATE_PORT(subghz_callback) = mp_const_none; | ||
} | ||
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void subghz_deinit(void) { | ||
MP_STATE_PORT(subghz_callback) = mp_const_none; | ||
NVIC_DisableIRQ(SUBGHZ_Radio_IRQn); | ||
__HAL_RCC_SUBGHZ_RADIO_FORCE_RESET(); | ||
__HAL_RCC_SUBGHZ_RADIO_RELEASE_RESET(); | ||
} | ||
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STATIC mp_obj_t subghz_cs(mp_obj_t value) { | ||
// Treat the same as normal SPI - truthy is "unselected", | ||
// falsey is active low "selected", | ||
if (mp_obj_is_true(value)) { | ||
LL_PWR_UnselectSUBGHZSPI_NSS(); | ||
} else { | ||
LL_PWR_SelectSUBGHZSPI_NSS(); | ||
} | ||
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return mp_const_none; | ||
} | ||
MP_DEFINE_CONST_FUN_OBJ_1(subghz_cs_obj, subghz_cs); | ||
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STATIC mp_obj_t subghz_irq(mp_obj_t handler) { | ||
MP_STATE_PORT(subghz_callback) = handler; | ||
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if (mp_obj_is_true(handler)) { | ||
HAL_NVIC_ClearPendingIRQ(SUBGHZ_Radio_IRQn); | ||
HAL_NVIC_EnableIRQ(SUBGHZ_Radio_IRQn); | ||
} else { | ||
HAL_NVIC_DisableIRQ(SUBGHZ_Radio_IRQn); | ||
} | ||
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return mp_const_none; | ||
} | ||
MP_DEFINE_CONST_FUN_OBJ_1(subghz_irq_obj, subghz_irq); | ||
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STATIC mp_obj_t subghz_is_busy(void) { | ||
// Read the raw unmasked busy signal. This should be checked before driving | ||
// CS low to start a command. | ||
// | ||
// Reads the raw RFBUSYS not the masked RFBUSYMS, in contradiction to EM0453 | ||
// 6.3 "Radio busy management". This is because the RFBUSYMS signal doesn't | ||
// seem to match the reference manual. Observed behaviour matches this bug | ||
// report instead: https://community.st.com/s/question/0D53W000014zFx9SAE | ||
// | ||
// Reading RFBUSYS won't cause any problems here provided a new SPI command | ||
// isn't immediately after the previous command, which shouldn't be possible | ||
// with MicroPython. | ||
return mp_obj_new_bool(LL_PWR_IsActiveFlag_RFBUSYS()); | ||
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} | ||
MP_DEFINE_CONST_FUN_OBJ_0(subghz_is_busy_obj, subghz_is_busy); | ||
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MP_REGISTER_ROOT_POINTER(mp_obj_t subghz_callback); | ||
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#endif // STM32WL |
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/* | ||
* This file is part of the MicroPython project, http://micropython.org/ | ||
* | ||
* The MIT License (MIT) | ||
* | ||
* Copyright (c) 2023 Angus Gratton | ||
* | ||
* Permission is hereby granted, free of charge, to any person obtaining a copy | ||
* of this software and associated documentation files (the "Software"), to deal | ||
* in the Software without restriction, including without limitation the rights | ||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
* copies of the Software, and to permit persons to whom the Software is | ||
* furnished to do so, subject to the following conditions: | ||
* | ||
* The above copyright notice and this permission notice shall be included in | ||
* all copies or substantial portions of the Software. | ||
* | ||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
* THE SOFTWARE. | ||
*/ | ||
#ifndef MICROPY_INCLUDED_STM32_SUBGHZ_H | ||
#define MICROPY_INCLUDED_STM32_SUBGHZ_H | ||
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#include "py/obj.h" | ||
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// Interface to the STM32WL series "SUBGHZ Radio" module | ||
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void subghz_init(void); | ||
void subghz_deinit(void); | ||
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MP_DECLARE_CONST_FUN_OBJ_1(subghz_cs_obj); | ||
MP_DECLARE_CONST_FUN_OBJ_1(subghz_irq_obj); | ||
MP_DECLARE_CONST_FUN_OBJ_0(subghz_is_busy_obj); | ||
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#endif |