CYAPA_CMD_LEN
u8 bl_data[CYAPA_CMD_LEN];
ret = cyapa_i2c_reg_read_block(cyapa, 0, CYAPA_CMD_LEN, bl_data);
if (ret != CYAPA_CMD_LEN)
unsigned char cmd[CYAPA_CMD_LEN + 1];
for (i = 0; i < len; i += CYAPA_CMD_LEN) {
cmd_len = (len - i >= CYAPA_CMD_LEN) ? CYAPA_CMD_LEN : len - i;