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esp8266: Correct SPI functionality when write_value is provided. 

It used to introduce extra clocks to the bus rather than changing the
value output.

This fixes SD cards.
This commit is contained in:
Scott Shawcroft 2017-10-16 14:54:23 -07:00
parent ef65ee78c5
commit 6c7d35c40c
1 changed files with 2 additions and 2 deletions
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4
esp8266/common-hal/busio/SPI.c
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@ -174,13 +174,13 @@ bool common_hal_busio_spi_read(busio_spi_obj_t *self,
write_value; write_value;
for (size_t j = 0; j < count; ++j) { for (size_t j = 0; j < count; ++j) {
for (size_t k = 0; k < chunk_size; ++k) { for (size_t k = 0; k < chunk_size; ++k) {
data[i] = spi_transaction(HSPI, 0, 0, 0, 0, 0, 0, 8, long_write_value); data[i] = spi_transaction(HSPI, 0, 0, 0, 0, 8, long_write_value, 8, 0);
++i; ++i;
} }
ets_loop_iter(); ets_loop_iter();
} }
while (i < len) { while (i < len) {
data[i] = spi_transaction(HSPI, 0, 0, 0, 0, 0, 0, 8, long_write_value); data[i] = spi_transaction(HSPI, 0, 0, 0, 0, 8, long_write_value, 8, 0);
++i; ++i;
} }
return true; return true;