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8a59f51111
GPIO12 is a strapping pin on the original ESP32: high at reset, it powers the flash at 1.8 V. A CC1101 can hold GDO2 high at power-up, so a board with RX on 12 bootloops after a power cut until EN is pressed. It was the default RX pin. - RX defaults to GPIO35 on the original ESP32. Saved settings keep their pins. - The log warns each time the radio starts, and the radio settings show a warning, while TX, RX or MISO is on a pin whose level at reset can stop the chip booting (src/BootPins.h, data-src/js/pins.js). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
49 lines
1.5 KiB
C++
49 lines
1.5 KiB
C++
#include <unity.h>
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#include <string.h>
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// No target defined: the original ESP32.
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#include "BootPins.h"
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void setUp() {}
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void tearDown() {}
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static void test_gpio12_picks_the_flash_voltage() {
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// Issue #34: a CC1101 holding GDO2 high on GPIO12 at power-up.
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const char *effect = bootPinEffect(12);
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TEST_ASSERT_NOT_NULL(effect);
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TEST_ASSERT_NOT_NULL(strstr(effect, "1.8 V"));
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}
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static void test_gpio0_picks_the_boot_mode() {
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const char *effect = bootPinEffect(0);
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TEST_ASSERT_NOT_NULL(effect);
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TEST_ASSERT_NOT_NULL(strstr(effect, "download mode"));
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}
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static void test_harmless_strapping_pins_are_not_listed() {
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// 2 only matters for the download mode, 5 and 15 set the SDIO timing and
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// the boot log. 5 is the default CSN.
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TEST_ASSERT_NULL(bootPinEffect(2));
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TEST_ASSERT_NULL(bootPinEffect(5));
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TEST_ASSERT_NULL(bootPinEffect(15));
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}
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static void test_default_radio_pins_are_safe() {
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// transceiver_config_t::load()'s defaults for the original ESP32.
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const uint8_t pins[] = {13, 35, 23, 19, 18, 5};
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for(uint8_t pin : pins) TEST_ASSERT_NULL_MESSAGE(bootPinEffect(pin), "default radio pin");
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}
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static void test_other_chips_boot_pins_are_safe_here() {
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TEST_ASSERT_NULL(bootPinEffect(9));
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TEST_ASSERT_NULL(bootPinEffect(45));
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}
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int main(int, char **) {
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UNITY_BEGIN();
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RUN_TEST(test_gpio12_picks_the_flash_voltage);
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RUN_TEST(test_gpio0_picks_the_boot_mode);
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RUN_TEST(test_harmless_strapping_pins_are_not_listed);
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RUN_TEST(test_default_radio_pins_are_safe);
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RUN_TEST(test_other_chips_boot_pins_are_safe_here);
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return UNITY_END();
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}
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