ECR_SPP
frob_set_mode(pb, ECR_SPP);
ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */
ECR_WRITE(pb, ECR_SPP << 5);
ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */
frob_set_mode(pb, ECR_SPP);
ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */
ECR_WRITE(pb, ECR_SPP << 5);