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Merge pull request #29 from hideakitai/fix/transaction-timeout
fix: transaction timeout
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65 changes: 65 additions & 0 deletions
65
examples/transfer_one_by_one_with_timeout/transfer_one_by_one_with_timeout_master/helper.h
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,65 @@ | ||
| #pragma once | ||
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| #include <Arduino.h> | ||
| #include <cstdint> | ||
| #include <cstddef> | ||
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| void dumpBuffers(const char *title, const uint8_t *buf, size_t start, size_t len) | ||
| { | ||
| // show title and range | ||
| if (len == 1) | ||
| printf("%s [%d]: ", title, start); | ||
| else | ||
| printf("%s [%d-%d]: ", title, start, start + len - 1); | ||
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| // show data in the range | ||
| for (size_t i = 0; i < len; i++) { | ||
| printf("%02X ", buf[start + i]); | ||
| } | ||
| printf("\n"); | ||
| } | ||
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| bool verifyAndDumpDifference(const char *a_title, const uint8_t *a_buf, size_t a_size, const char *b_title, const uint8_t *b_buf, size_t b_size) | ||
| { | ||
| bool verified = true; | ||
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| if (a_size != b_size) { | ||
| printf("received data size does not match: expected = %d / actual = %d\n", a_size, b_size); | ||
| return false; | ||
| } | ||
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| for (size_t i = 0; i < a_size; i++) { | ||
| // if a_buf and b_buf is same, continue | ||
| if (a_buf[i] == b_buf[i]) { | ||
| continue; | ||
| } | ||
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| verified = false; | ||
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| // if a_buf[i] and b_buf[i] is not same, check the range that has difference | ||
| size_t j = 1; | ||
| while (a_buf[i + j] != b_buf[i + j]) { | ||
| j++; | ||
| } | ||
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| // dump different data range | ||
| dumpBuffers(a_title, a_buf, i, j); | ||
| dumpBuffers(b_title, b_buf, i, j); | ||
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| // restart from next same index (-1 considers i++ in for()) | ||
| i += j - 1; | ||
| } | ||
| return verified; | ||
| } | ||
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| void initializeBuffers(uint8_t *tx, uint8_t *rx, size_t size, size_t offset = 0) | ||
| { | ||
| if (tx) { | ||
| for (size_t i = 0; i < size; i++) { | ||
| tx[i] = (i + offset) & 0xFF; | ||
| } | ||
| } | ||
| if (rx) { | ||
| memset(rx, 0, size); | ||
| } | ||
| } |
49 changes: 49 additions & 0 deletions
49
...meout/transfer_one_by_one_with_timeout_master/transfer_one_by_one_with_timeout_master.ino
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| #include <SPI.h> | ||
| #include "helper.h" | ||
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| SPIClass master(HSPI); | ||
| #ifdef CONFIG_IDF_TARGET_ESP32 | ||
| static constexpr uint8_t PIN_SS = 15; | ||
| #else | ||
| static constexpr uint8_t PIN_SS = SS; | ||
| #endif | ||
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| static constexpr size_t BUFFER_SIZE = 8; | ||
| uint8_t tx_buf[BUFFER_SIZE] {1, 2, 3, 4, 5, 6, 7, 8}; | ||
| uint8_t rx_buf[BUFFER_SIZE] {0, 0, 0, 0, 0, 0, 0, 0}; | ||
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| void setup() | ||
| { | ||
| Serial.begin(115200); | ||
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| delay(2000); | ||
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| pinMode(PIN_SS, OUTPUT); | ||
| digitalWrite(PIN_SS, HIGH); | ||
| master.begin(SCK, MISO, MOSI, PIN_SS); | ||
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| delay(2000); | ||
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| Serial.println("start spi master"); | ||
| } | ||
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| void loop() | ||
| { | ||
| // initialize tx/rx buffers | ||
| initializeBuffers(tx_buf, rx_buf, BUFFER_SIZE); | ||
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| master.beginTransaction(SPISettings(1000000, MSBFIRST, SPI_MODE0)); | ||
| digitalWrite(PIN_SS, LOW); | ||
| master.transferBytes(tx_buf, rx_buf, BUFFER_SIZE); | ||
| digitalWrite(PIN_SS, HIGH); | ||
| master.endTransaction(); | ||
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| // verify and dump difference with received data | ||
| if (verifyAndDumpDifference("master", tx_buf, BUFFER_SIZE, "slave", rx_buf, BUFFER_SIZE)) { | ||
| Serial.println("successfully received expected data from slave"); | ||
| } else { | ||
| Serial.println("unexpected difference found between master/slave data"); | ||
| } | ||
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| delay(2500); // slave will timeout after 1000ms | ||
| } |
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