Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
|
en:spi_dot_matrix [2016/12/09 11:29] charles.park [SPI Dot-Matrix] |
en:spi_dot_matrix [2017/01/18 17:13] charles.park [Example of Scrolling Text] |
||
|---|---|---|---|
| Line 123: | Line 123: | ||
| struct spi_ioc_transfer tr; | struct spi_ioc_transfer tr; | ||
| + | memset((void *)&tr, 0x00, sizeof(tr)); | ||
| + | | ||
| tr.tx_buf = (unsigned long)tx; | tr.tx_buf = (unsigned long)tx; | ||
| tr.rx_buf = (unsigned long)rx; | tr.rx_buf = (unsigned long)rx; | ||
| Line 351: | Line 353: | ||
| { | { | ||
| struct spi_ioc_transfer tr; | struct spi_ioc_transfer tr; | ||
| + | |||
| + | memset((void *)&tr, 0x00, sizeof(tr)); | ||
| tr.tx_buf = (unsigned long)buf; | tr.tx_buf = (unsigned long)buf; | ||
