esp-idf 一些tips

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更新esp-idf
直接删除$HOME/esp/esp-idf
再 git clone --recursive https://github.com/espressif/esp-idf.git
再

cd ~/esp/esp-idf
./install.sh

修改 $HOME/.profile 来改变环境变量

alias get_idf='. $HOME/esp/esp-idf/export.sh'

menuconfig
make menuconfig
Serial flasher config 可以设置Flash size
Partition Table (Custom partition table CSV) 设置app的分区大点
Component config --> Common ESP-related --->可以关掉看门狗 [ ] Interrupt watchdog
[ ] Initialize Task Watchdog Timer on startup
Component config --> Bluetooth --->一些蓝牙的设置，可以让include的文件回来。

from machine import Pin

cols = [4,0]
rows = [2,15]

def m_setup():
	for c in cols:
		Pin(c, mode=Pin.IN, pull=Pin.PULL_UP)
	for r in rows:
		Pin(r,mode=Pin.OUT)
		Pin(r).value(0)


def loop():
	for r in rows:
		Pin(r).value(0)
		for c in cols:
			if Pin(c).value()==0:
				print("r:%s ,c:%s",r,c)
		Pin(r).value(1)

if __name__ == '__main__':
	m_setup()
	while 1:
		loop()

void scan_matrix(void) {
	for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
		gpio_set_level(MATRIX_ROWS_PINS[row], 0);
		for (uint8_t col = 0; col < MATRIX_COLS; col++) {
			curState = gpio_get_level(MATRIX_COLS_PINS[col]);
			if (PREV_MATRIX_STATE[row][col] != curState) {
				DEBOUNCE_MATRIX[row][col] = millis();
			}
			PREV_MATRIX_STATE[row][col] = curState;
			if ((millis() - DEBOUNCE_MATRIX[row][col]) > DEBOUNCE) {
				if (MATRIX_STATE[row][col] != curState) {
					MATRIX_STATE[row][col] = curState;
				}
			}
		}
		gpio_set_level(MATRIX_ROWS_PINS[row], 1);

	}

esp32引脚

GPIO	Input	Output	Notes
0	pulled up	OK	outputs PWM signal at boot
1	TX pin	OK	debug output at boot
2	OK	OK	connected to on-board LED
3	OK	RX pin	HIGH at boot
4	OK	OK
5	OK	OK	outputs PWM signal at boot
6	x	x	connected to the integrated SPI flash
7	x	x	connected to the integrated SPI flash
8	x	x	connected to the integrated SPI flash
9	x	x	connected to the integrated SPI flash
10	x	x	connected to the integrated SPI flash
11	x	x	connected to the integrated SPI flash
12	OK	OK	boot fail if pulled high
13	OK	OK
14	OK	OK	outputs PWM signal at boot
15	OK	OK	outputs PWM signal at boot
16	OK	OK
17	OK	OK
18	OK	OK
19	OK	OK
21	OK	OK
22	OK	OK
23	OK	OK
25	OK	OK
26	OK	OK
27	OK	OK
32	OK	OK
33	OK	OK
34	OK		input only
35	OK		input only
36	OK		input only
39	OK		input only

有些io会在启动和reset的时候输出pwm，用这些io输出的时候要注意
GPIO 1
GPIO 3
GPIO 5
GPIO 14
GPIO 15

参考连接方式
cols 12 33 25 26 27 14 32
rows 19 23 18 2 16