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circuitpython/ports/samd/modmachine.c
robert-hh 47fa723586 samd/modmachine: Make some machine classes configurable by #defines. 
These include ADC, DAC, I2C, SoftI2C, SPI, SoftI2C, PWM, UART, pulse.  This
is useful for devices like the Adafruit Trinket series which have almost no
accessible GPIO pins.

Signed-off-by: robert-hh <robert@hammelrath.com>
2023-05-22 18:39:07 +10:00

303 lines
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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2019 Damien P. George
*
* 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.
*/
#include "py/runtime.h"
#include "extmod/machine_bitstream.h"
#include "extmod/machine_mem.h"
#include "extmod/machine_pulse.h"
#include "extmod/machine_i2c.h"
#include "extmod/machine_signal.h"
#include "extmod/machine_spi.h"
#include "drivers/dht/dht.h"
#include "shared/runtime/pyexec.h"
#include "modmachine.h"
#include "samd_soc.h"
// ASF 4
#include "hal_flash.h"
#include "hal_init.h"
#include "hpl_gclk_base.h"
#include "hpl_pm_base.h"
#if MICROPY_PY_MACHINE
#if defined(MCU_SAMD21)
#define DBL_TAP_ADDR ((volatile uint32_t *)(HMCRAMC0_ADDR + HMCRAMC0_SIZE - 4))
#elif defined(MCU_SAMD51)
#define DBL_TAP_ADDR ((volatile uint32_t *)(HSRAM_ADDR + HSRAM_SIZE - 4))
#endif
// A board may define a DPL_TAP_ADDR_ALT, which will be set as well
// Needed at the moment for Sparkfun SAMD51 Thing Plus
#define DBL_TAP_MAGIC_LOADER 0xf01669ef
#define DBL_TAP_MAGIC_RESET 0xf02669ef
#define LIGHTSLEEP_CPU_FREQ 200000
extern bool EIC_occured;
extern uint32_t _dbl_tap_addr;
STATIC mp_obj_t machine_soft_reset(void) {
pyexec_system_exit = PYEXEC_FORCED_EXIT;
mp_raise_type(&mp_type_SystemExit);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_soft_reset_obj, machine_soft_reset);
STATIC mp_obj_t machine_reset(void) {
*DBL_TAP_ADDR = DBL_TAP_MAGIC_RESET;
#ifdef DBL_TAP_ADDR_ALT
*DBL_TAP_ADDR_ALT = DBL_TAP_MAGIC_RESET;
#endif
NVIC_SystemReset();
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_0(machine_reset_obj, machine_reset);
NORETURN mp_obj_t machine_bootloader(size_t n_args, const mp_obj_t *args) {
*DBL_TAP_ADDR = DBL_TAP_MAGIC_LOADER;
#ifdef DBL_TAP_ADDR_ALT
*DBL_TAP_ADDR_ALT = DBL_TAP_MAGIC_LOADER;
#endif
NVIC_SystemReset();
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_bootloader_obj, 0, 1, machine_bootloader);
STATIC mp_obj_t machine_freq(size_t n_args, const mp_obj_t *args) {
if (n_args == 0) {
return MP_OBJ_NEW_SMALL_INT(get_cpu_freq());
} else {
uint32_t freq = mp_obj_get_int(args[0]);
if (freq >= 1000000 && freq <= MAX_CPU_FREQ) {
set_cpu_freq(freq);
}
return mp_const_none;
}
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_freq_obj, 0, 1, machine_freq);
STATIC mp_obj_t machine_unique_id(void) {
// Each device has a unique 128-bit serial number which is a concatenation of four 32-bit
// words contained at the following addresses. The uniqueness of the serial number is
// guaranteed only when using all 128 bits.
// Atmel SAM D21E / SAM D21G / SAM D21J
// SMART ARM-Based Microcontroller
// DATASHEET
// 9.6 (SAMD51) or 9.3.3 (or 10.3.3 depending on which manual)(SAMD21) Serial Number
//
// EXAMPLE (SAMD21)
// ----------------
// OpenOCD:
// Word0:
// > at91samd21g18.cpu mdw 0x0080A00C 1
// 0x0080a00c: 6e27f15f
// Words 1-3:
// > at91samd21g18.cpu mdw 0x0080A040 3
// 0x0080a040: 50534b54 332e3120 ff091645
//
// MicroPython (this code and same order as shown in Arduino IDE)
// >>> ubinascii.hexlify(machine.unique_id())
// b'6e27f15f50534b54332e3120ff091645'
#if defined(MCU_SAMD21)
uint32_t *id_addresses[4] = {(uint32_t *)0x0080A00C, (uint32_t *)0x0080A040,
(uint32_t *)0x0080A044, (uint32_t *)0x0080A048};
#elif defined(MCU_SAMD51)
uint32_t *id_addresses[4] = {(uint32_t *)0x008061FC, (uint32_t *)0x00806010,
(uint32_t *)0x00806014, (uint32_t *)0x00806018};
#endif
uint8_t raw_id[16];
for (int i = 0; i < 4; i++) {
for (int k = 0; k < 4; k++) {
// 'Reverse' the read bytes into a 32 bit word (Consistent with Arduino)
raw_id[4 * i + k] = (*(id_addresses[i]) >> (24 - k * 8)) & 0xff;
}
}
return mp_obj_new_bytes((byte *)&raw_id, sizeof(raw_id));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_unique_id_obj, machine_unique_id);
STATIC mp_obj_t machine_idle(void) {
MICROPY_EVENT_POLL_HOOK;
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_idle_obj, machine_idle);
STATIC mp_obj_t machine_disable_irq(void) {
uint32_t state = MICROPY_BEGIN_ATOMIC_SECTION();
return mp_obj_new_int(state);
}
MP_DEFINE_CONST_FUN_OBJ_0(machine_disable_irq_obj, machine_disable_irq);
STATIC mp_obj_t machine_enable_irq(mp_obj_t state_in) {
uint32_t state = mp_obj_get_int(state_in);
MICROPY_END_ATOMIC_SECTION(state);
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_1(machine_enable_irq_obj, machine_enable_irq);
STATIC mp_obj_t machine_reset_cause(void) {
#if defined(MCU_SAMD21)
return MP_OBJ_NEW_SMALL_INT(PM->RCAUSE.reg);
#elif defined(MCU_SAMD51)
return MP_OBJ_NEW_SMALL_INT(RSTC->RCAUSE.reg);
#else
return MP_OBJ_NEW_SMALL_INT(0);
#endif
}
MP_DEFINE_CONST_FUN_OBJ_0(machine_reset_cause_obj, machine_reset_cause);
STATIC mp_obj_t machine_lightsleep(size_t n_args, const mp_obj_t *args) {
int32_t duration = -1;
uint32_t freq = get_cpu_freq();
if (n_args > 0) {
duration = mp_obj_get_int(args[0]);
}
EIC_occured = false;
// Slow down
set_cpu_freq(LIGHTSLEEP_CPU_FREQ);
#if defined(MCU_SAMD21)
// Switch the peripheral clock off
GCLK->GENCTRL.reg = GCLK_GENCTRL_ID(2);
while (GCLK->STATUS.bit.SYNCBUSY) {
}
// Switch the EIC temporarily to GCLK3, since GCLK2 is off
GCLK->CLKCTRL.reg = GCLK_CLKCTRL_CLKEN | GCLK_CLKCTRL_GEN_GCLK3 | EIC_GCLK_ID;
if (duration > 0) {
uint32_t t0 = systick_ms;
while ((systick_ms - t0 < duration) && (EIC_occured == false)) {
__WFI();
}
} else {
while (EIC_occured == false) {
__WFI();
}
}
GCLK->CLKCTRL.reg = GCLK_CLKCTRL_CLKEN | GCLK_CLKCTRL_GEN_GCLK2 | EIC_GCLK_ID;
#elif defined(MCU_SAMD51)
// Switch the peripheral clock off
GCLK->GENCTRL[2].reg = 0;
while (GCLK->SYNCBUSY.bit.GENCTRL2) {
}
// Switch the EIC temporarily to GCLK3, since GCLK2 is off
GCLK->PCHCTRL[EIC_GCLK_ID].reg = GCLK_PCHCTRL_CHEN | GCLK_PCHCTRL_GEN_GCLK3;
if (duration > 0) {
uint32_t t0 = systick_ms;
while ((systick_ms - t0 < duration) && (EIC_occured == false)) {
__WFI();
}
} else {
while (EIC_occured == false) {
__WFI();
}
}
GCLK->PCHCTRL[EIC_GCLK_ID].reg = GCLK_PCHCTRL_CHEN | GCLK_PCHCTRL_GEN_GCLK2;
#endif
// Speed up again
set_cpu_freq(freq);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_lightsleep_obj, 0, 1, machine_lightsleep);
STATIC const mp_rom_map_elem_t machine_module_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_umachine) },
{ MP_ROM_QSTR(MP_QSTR_soft_reset), MP_ROM_PTR(&machine_soft_reset_obj) },
{ MP_ROM_QSTR(MP_QSTR_reset), MP_ROM_PTR(&machine_reset_obj) },
{ MP_ROM_QSTR(MP_QSTR_bootloader), MP_ROM_PTR(&machine_bootloader_obj) },
{ MP_ROM_QSTR(MP_QSTR_freq), MP_ROM_PTR(&machine_freq_obj) },
{ MP_ROM_QSTR(MP_QSTR_mem8), MP_ROM_PTR(&machine_mem8_obj) },
{ MP_ROM_QSTR(MP_QSTR_mem16), MP_ROM_PTR(&machine_mem16_obj) },
{ MP_ROM_QSTR(MP_QSTR_mem32), MP_ROM_PTR(&machine_mem32_obj) },
{ MP_ROM_QSTR(MP_QSTR_unique_id), MP_ROM_PTR(&machine_unique_id_obj) },
#if MICROPY_PY_MACHINE_ADC
{ MP_ROM_QSTR(MP_QSTR_ADC), MP_ROM_PTR(&machine_adc_type) },
#endif
#if MICROPY_PY_MACHINE_DAC
{ MP_ROM_QSTR(MP_QSTR_DAC), MP_ROM_PTR(&machine_dac_type) },
#endif
{ MP_ROM_QSTR(MP_QSTR_Pin), MP_ROM_PTR(&machine_pin_type) },
{ MP_ROM_QSTR(MP_QSTR_Signal), MP_ROM_PTR(&machine_signal_type) },
#if MICROPY_PY_MACHINE_PWM
{ MP_ROM_QSTR(MP_QSTR_PWM), MP_ROM_PTR(&machine_pwm_type) },
#endif
#if MICROPY_PY_MACHINE_SOFTI2C
{ MP_ROM_QSTR(MP_QSTR_SoftI2C), MP_ROM_PTR(&mp_machine_soft_i2c_type) },
#endif
#if MICROPY_PY_MACHINE_I2C
{ MP_ROM_QSTR(MP_QSTR_I2C), MP_ROM_PTR(&machine_i2c_type) },
#endif
#if MICROPY_PY_MACHINE_SOFTSPI
{ MP_ROM_QSTR(MP_QSTR_SoftSPI), MP_ROM_PTR(&mp_machine_soft_spi_type) },
#endif
#if MICROPY_PY_MACHINE_SPI
{ MP_ROM_QSTR(MP_QSTR_SPI), MP_ROM_PTR(&machine_spi_type) },
#endif
{ MP_ROM_QSTR(MP_QSTR_Timer), MP_ROM_PTR(&machine_timer_type) },
#if MICROPY_PY_MACHINE_UART
{ MP_ROM_QSTR(MP_QSTR_UART), MP_ROM_PTR(&machine_uart_type) },
#endif
{ MP_ROM_QSTR(MP_QSTR_WDT), MP_ROM_PTR(&machine_wdt_type) },
#if MICROPY_PY_MACHINE_RTC
{ MP_ROM_QSTR(MP_QSTR_RTC), MP_ROM_PTR(&machine_rtc_type) },
#endif
{ MP_ROM_QSTR(MP_QSTR_idle), MP_ROM_PTR(&machine_idle_obj) },
{ MP_ROM_QSTR(MP_QSTR_disable_irq), MP_ROM_PTR(&machine_disable_irq_obj) },
{ MP_ROM_QSTR(MP_QSTR_enable_irq), MP_ROM_PTR(&machine_enable_irq_obj) },
{ MP_ROM_QSTR(MP_QSTR_reset_cause), MP_ROM_PTR(&machine_reset_cause_obj) },
#if MICROPY_PY_MACHINE_PULSE
{ MP_ROM_QSTR(MP_QSTR_time_pulse_us), MP_ROM_PTR(&machine_time_pulse_us_obj) },
#endif
{ MP_ROM_QSTR(MP_QSTR_lightsleep), MP_ROM_PTR(&machine_lightsleep_obj) },
{ MP_ROM_QSTR(MP_QSTR_deepsleep), MP_ROM_PTR(&machine_lightsleep_obj) },
{ MP_ROM_QSTR(MP_QSTR_bitstream), MP_ROM_PTR(&machine_bitstream_obj) },
#if MICROPY_PY_MACHINE_DHT_READINTO
{ MP_ROM_QSTR(MP_QSTR_dht_readinto), MP_ROM_PTR(&dht_readinto_obj) },
#endif
// Class constants.
// Use numerical constants instead of the symbolic names,
// since the names differ between SAMD21 and SAMD51.
{ MP_ROM_QSTR(MP_QSTR_PWRON_RESET), MP_ROM_INT(0x01) },
{ MP_ROM_QSTR(MP_QSTR_HARD_RESET), MP_ROM_INT(0x10) },
{ MP_ROM_QSTR(MP_QSTR_WDT_RESET), MP_ROM_INT(0x20) },
{ MP_ROM_QSTR(MP_QSTR_SOFT_RESET), MP_ROM_INT(0x40) },
{ MP_ROM_QSTR(MP_QSTR_DEEPSLEEP_RESET), MP_ROM_INT(0x80) },
};
STATIC MP_DEFINE_CONST_DICT(machine_module_globals, machine_module_globals_table);
const mp_obj_module_t mp_module_machine = {
.base = { &mp_type_module },
.globals = (mp_obj_dict_t *)&machine_module_globals,
};
MP_REGISTER_MODULE(MP_QSTR_umachine, mp_module_machine);
#endif // MICROPY_PY_MACHINE
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