ice_cram.h

Library for writing to the FPGA CRAM chip.

Work In Progress: It is implemented but needs to be debugged.

void ice_cram_open(void)

Reset the iCE40 and set it to CRAM configuration mode and prepare the incoming SPI transfer.

void ice_cram_write(const uint8_t *buf, size_t len)

• buf - pointer to bitstream data to flush to the iCE40
• len - size of that buffer

Send the bitstream to the iCE40 CRAM, which configures the FPGA circuitry.

bool ice_cram_close(void)

Terminate the SPI transaction and prepare the FPGA to start, waiting until it finishes booting.

Return true if the FPGA configuration succeeded or false if it timed out.