Help converting atmega32u4 #4
Comments
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I will work on this for you, not sure how long it will take, could be quick. It’s been a while since I did this so I’ll have to refresh myself, thanks for the project! What exact board do you have?Sent from my iPhoneOn Oct 27, 2022, at 9:05 PM, NonaSuomy ***@***.***> wrote:
Hi @thebradleysanders
I see you converted the code for the mega any idea how to convert it for the 32u4?
https://github.com/thebradleysanders/ESPHome-Arduino-Port-Expander/blob/main/arduino_port_expander.h#L34
How do you get the right binary values for the pins?
01 (INT.6/AIN0) PE6
02 UVcc
03 D
04 D+
05 UGnd
06 UCap
07 VBus
08 (SS/PCINT0) PB0
09 (PCINT1/SCLK) PB1
10 (PDI/PCINT2/MOSI) PB2
11 (PDO/PCINT3/MISO) PB3
12 (PCINT7/OC0A/OC1C/RTS) PB7
13 RESET
14 VCC
15 GND
16 XTAL2
17 XTAL1
*18 (OC0B/SCL/INT0) PD0
*19 (SDA/INT1) PD1
20 (RXD1/INT2) PD2
21 (TXD1/INT3) PD3
22 (XCK1/CTS) PD5
23 GND
24 AVCC
25 PD4 (ICP1/ADC8)
26 PD6 (T1/OC4D/ADC9)
27 PD7 (T0/OC4D/ADC10)
28 PB4 (PCINT4/ADC11)
29 PB5 (PCINT5/OC1A/OC4B/ADC12)
30 PB6 (PCINT6/OC1B/OC4B/ADC13)
31 PC6 (OC3A/OC4A)
32 PC7 (ICP3/CLK0/OC4A)
33 PE2 (HWB)
34 VCC
35 GND
Analog
32u4 324p Not defined
36 PF7 (ADC7/TDI) 22 ADC7
37 PF6 (ADC6/TDO) 19 ADC6
38 PF5 (ADC5/TMS) 28 PC5 (ADC5/SCL/PCINT13) 26 PC3 (ADC3/PCINT11)
39 PF4 (ADC4/TCK) 27 PC4 (ADC4/SDA/PCINT12) 25 PC2 (ADC2/PCINT10)
40 PF1 (ADC1) 22 PC1 (ADC1/PCINT9)
41 PF0 (ADC0) 23 PC0 (ADC0/PCINT8)
42 AREF
43 GND
44 AVCC
Thank you for any help.
—Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you were mentioned.Message ID: ***@***.***>
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Better yet, it should work, the only thing that shouldn't is the analog pins, can you try and and let me know if the digital pins work? I don't have a board to test. |
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I have not tested the digital pins yet as I wanted to use the analog ones. Will have a look and report back. Seems they have 12 analog pins broken out on this board A0-A11. Currently A0 gives me a value in the 100’s with a 10k pot attached. A1 gives a value in the 10000’s for some reason (thought it was supposed to only be 0-1023) all the rest of the analog just show zero.
https://medesign.seas.upenn.edu/index.php/Guides/MaEvArM-adc |
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Is it possible to convert the analog pin defined part to use Arduino A0 etc internal pin definitions so these binary values wouldn't be required? |
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With the default code base: Stuff in brackets confirmed pins applied 2.64V with the 10K Pot to the analog pins. 7.09KOhm~ ttgo-poe-001.yaml (ESPHome) |
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I'm not really sure what I'm doing but I got more than 0's by playing with the binary values. In the new Arduino IDE 2.0 I could hover over the pin values and then it would show me the correct pin values: The values are dumping all over the place now so I'm sure I'm messing up the way it processes the analog values now with its bitwise operation. Only pin F5 connected: No pins connected: Full code /*
Ports:
0 0 .. 13 13
A0: 14, A1: 15, A2: 16, A3: 17: A4: 18: A5: 19: A6: 20, A7: 21
port bits: 5 ... 0..32
0: 0: 00000
1: 1: 00001
A7: 21: 10101
*/
#include <Arduino.h>
#include <Wire.h>
//#define DEBUG 1 // remove debug so pin 0 and 1 can be used for IO
//#define DEBUG_READ 1
#define I2C_ADDRESS 9
void onRequest();
void onReceive(int);
void setup()
{
#ifdef DEBUG
Serial.begin(115200);
Serial.println(F("Init "));
#endif
analogReference(INTERNAL);
Wire.begin(I2C_ADDRESS);
Wire.onRequest(onRequest);
Wire.onReceive(onReceive);
#ifdef DEBUG
Serial.println(F("Wire ok"));
#endif
}
void loop()
{
//int temp = analogRead(A1);
//Serial.println(temp);
}
volatile byte buffer[3];
volatile byte len = 1;
#define DIGITAL_READ(b, pin, mask) \
if (digitalRead(pin)) \
buffer[b] |= mask;
void readDigital()
{
len = 3;
buffer[0] = 0;
DIGITAL_READ(0, PIN_B0, 1); // Digital
DIGITAL_READ(0, PIN_B1, 2); // Digital
DIGITAL_READ(0, PIN_B2, 4); // Digital
DIGITAL_READ(0, PIN_B3, 8); // Digital
DIGITAL_READ(0, PIN_B7, 16); // Digital
DIGITAL_READ(0, PIN_E6, 32); // Digital
//I2C Teensy 2.0
//DIGITAL_READ(0, PIN_D0, 32); // Digital
//DIGITAL_READ(0, PIN_D1, 64); // Digital
DIGITAL_READ(0, PIN_D2, 128); // Digital
buffer[1] = 0;
DIGITAL_READ(1, PIN_D3, 1); // Digital
DIGITAL_READ(1, PIN_C6, 2); // Digital
DIGITAL_READ(1, PIN_C7, 4); // Digital
DIGITAL_READ(1, PIN_D6, 8); // Analog
DIGITAL_READ(1, PIN_D7, 16); // Analog
DIGITAL_READ(1, PIN_B4, 32); // Analog
DIGITAL_READ(1, PIN_B5, 64); // Analog
DIGITAL_READ(1, PIN_B6, 128); // Analog
buffer[2] = 0;
DIGITAL_READ(2, PIN_F7, 1); // Analog
DIGITAL_READ(2, PIN_F6, 2); // Analog
// I2C
DIGITAL_READ(2, PIN_F5, 4); // Analog
DIGITAL_READ(2, PIN_F4, 8); // Analog
DIGITAL_READ(2, PIN_F1, 16); // Analog
DIGITAL_READ(2, PIN_F0, 32); // Analog
DIGITAL_READ(2, PIN_D4, 64); // Analog
DIGITAL_READ(2, PIN_D5, 128); // Digital
//A11 22 0x16 10110;
//A0 21 0x15 10101;
//A1 20 0x14 10100;
//A2 19 0x13 10011;
//A3 18 0x12 10010;
//A4 17 0x11 10001;
//A5 16 0x10 10000;
//A6 15 0xf 1111;
//A7 14 0xe 1110;
//A8 13 0xd 1101;
//A9 12 0xc 1100;
//A10 10 0xa 1010;
//buffer[3] = 0;
//DIGITAL_READ(3, PIN_E6, 1);
// DIGITAL READ not supports on A3 .. A7
#ifdef DEBUG_READ
Serial.print(F("Read 3 bytes: "));
Serial.print(buffer[0]);
Serial.print(' ');
Serial.print(buffer[1]);
Serial.print(' ');
Serial.println(buffer[2]);
#endif
}
void readAnalog(int pin)
{
int val = analogRead(A9 + pin);
len = 2;
buffer[0] = val & 0xFF;
buffer[1] = (val >> 8) & 0b11;
#ifdef DEBUG_READ
Serial.print(F("Read analog pin "));
Serial.println(pin);
#endif
}
void onRequest()
{
Wire.write(const_cast<uint8_t *>(buffer), len);
}
#define CMD_DIGITAL_READ 0x0
#define CMD_WRITE_ANALOG 0x2
#define CMD_WRITE_DIGITAL_HIGH 0x3
#define CMD_WRITE_DIGITAL_LOW 0x4
#define CMD_SETUP_PIN_OUTPUT 0x5
#define CMD_SETUP_PIN_INPUT_PULLUP 0x6
#define CMD_SETUP_PIN_INPUT 0x7
// 8 analog registers.. A0 to A7
// A4 and A5 not supported due to I2C
#define CMD_ANALOG_READ_A9 0b1100 // 0x8
// ....
#define CMD_ANALOG_READ_A0 0b10101 // 0xF
#define CMD_SETUP_ANALOG_INTERNAL 0x10
#define CMD_SETUP_ANALOG_DEFAULT 0x11
void onReceive(int numBytes)
{
#ifdef DEBUG_READ
Serial.print("Received bytes: ");
Serial.println(numBytes);
#endif
int cmd = Wire.read();
switch (cmd)
{
case CMD_DIGITAL_READ:
readDigital();
break;
}
if (cmd >= CMD_ANALOG_READ_A9 && cmd <= CMD_ANALOG_READ_A0)
{
readAnalog(cmd & 0b111);
return;
}
int pin = Wire.read();
switch (cmd)
{
case CMD_WRITE_DIGITAL_HIGH:
case CMD_WRITE_DIGITAL_LOW:
{
bool output = cmd == CMD_WRITE_DIGITAL_HIGH;
digitalWrite(pin, output);
#ifdef DEBUG
Serial.print(F("Pin "));
Serial.print(pin);
Serial.println(output ? F(" HIGH") : F(" LOW"));
#endif
break;
}
case CMD_WRITE_ANALOG:
{
int val = Wire.read() & (Wire.read() << 8);
analogWrite(pin, val);
#ifdef DEBUG
Serial.print(F("Pin "));
Serial.print(pin);
Serial.print(F(" Analog write "));
Serial.println(val);
#endif
break;
}
case CMD_SETUP_PIN_OUTPUT:
pinMode(pin, OUTPUT);
#ifdef DEBUG
Serial.print(F("Pin "));
Serial.print(pin);
Serial.println(F(" OUTPUT"));
#endif
break;
case CMD_SETUP_PIN_INPUT:
pinMode(pin, INPUT);
#ifdef DEBUG
Serial.print(F("Pin "));
Serial.print(pin);
Serial.println(F("INPUT"));
#endif
break;
case CMD_SETUP_PIN_INPUT_PULLUP:
pinMode(pin, INPUT_PULLUP);
#ifdef DEBUG
Serial.print(F("Pin "));
Serial.print(pin);
Serial.println(F("INPUT PULLUP"));
#endif
break;
case CMD_SETUP_ANALOG_INTERNAL:
analogReference(INTERNAL);
//#ifdef DEBUG
//Serial.println(F("Analog reference INTERNAL"));
//#endif
break;
case CMD_SETUP_ANALOG_DEFAULT:
analogReference(DEFAULT);
//#ifdef DEBUG
//Serial.println(F("Analog reference DEFAULT"));
//#endif
break;
}
} |
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Hi @thebradleysanders
I see you converted the code for the mega any idea how to convert it for the 32u4?
https://github.com/thebradleysanders/ESPHome-Arduino-Port-Expander/blob/main/arduino_port_expander.h#L34
How do you get the right binary values for the pins?
Thank you for any help.
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