arduino-esp32
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espressif
Wrong SPIs typology for ESP32C3
Board
esp32-c3-devkitm-1
Device Description
ESP32-C3 in devkitm-1
Hardware Configuration
Master SPI pins (4 - SCK, 5 - MISO, 6 - MOSI) to a slave module
Version
v2.0.6
IDE Name
PlatformIO
Operating System
Linux
Flash frequency
160Mhz
PSRAM enabled
yes
Upload speed
N/A
Description
According to documentation, ESP32C3 has 2 SPIs peripherals, splitted in SPI0 & SPI1 used for attached flash memory, and SPI2 that is a general purpose SPI controller.
When instanciating a SPI on ESP32C3, the default spi number is FSPI that expands to0. But this is confusing with the documentation that says SPI0 is for flash memory (and is compatible with convention in FSPI).
Other issue is that SPI.begin returns void, and when passing a value larger than SPI_COUNT, we don't get errors. Arduino library for esp8266 returns a boolean with success or failure.
Sketch
#include <SPI.h>
#include <Arduino.h>
#define HSPI_MISO MISO
#define HSPI_MOSI MOSI
#define HSPI_SCLK SCK
#define HSPI_SS 18
static const int spiClk = 100000; // 1 MHz
SPIClass *working = NULL;
SPIClass *notWorking = NULL;
void setup()
{
Serial.begin(115200);
Serial.setDebugOutput(true);
working = new SPIClass();
//notWorking = new SPIClass(HSPI);
working->begin(HSPI_SCLK, HSPI_MISO, HSPI_MOSI);
working->beginTransaction(SPISettings(spiClk, MSBFIRST, SPI_MODE0));
Serial.printf("worked: %i != 0", working->getClockDivider());
working->endTransaction();
// set up slave select pins as outputs as the Arduino API
// doesn't handle automatically pulling SS low
pinMode(HSPI_SS, OUTPUT); // HSPI SS
}
void loop()
{
delay(100);
}
Debug Message
Depending on SPIClass, sketch returns getClockDivider() == 0 or a correct value
Other Steps to Reproduce
No response
I have checked existing issues, online documentation and the Troubleshooting Guide
- [X] I confirm I have checked existing issues, online documentation and Troubleshooting guide.
@P-R-O-C-H-Y Please take a look on this, postponing it to 3.1.0 milestone, there are 2 relevant tickets I am closing in favor of this one.
