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Fix overflow of write_buffer #14

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Fix overflow of write_buffer #14

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10 changes: 7 additions & 3 deletions main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -130,13 +130,17 @@ void process(const pio_spi_inst_t *spi, int command) {

uint32_t wlen = getu24();
uint32_t rlen = getu24();
uint32_t chunk;

cs_select(PIN_CS);
fread(write_buffer, 1, wlen, stdin);
pio_spi_write8_blocking(spi, write_buffer, wlen);

for(uint32_t i = 0; i < wlen; i += chunk) {
chunk = MIN(wlen - i, sizeof(write_buffer));
fread(write_buffer, 1, wlen, stdin);
pio_spi_write8_blocking(spi, write_buffer, wlen);
}

putchar(S_ACK);
uint32_t chunk;
char buf[128];

for(uint32_t i = 0; i < rlen; i += chunk) {
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