SPI_SH_RBE
while (spi_sh_read(ss, SPI_SH_CR1) & SPI_SH_RBE) {
spi_sh_read(ss, SPI_SH_CR1) & SPI_SH_RBE) {
if (cr1 & SPI_SH_RBE)
ss->cr1 |= SPI_SH_RBE;