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products:sbc:common:applications:gpio:spi [2022/12/20 04:30] nick [Table] |
products:sbc:common:applications:gpio:spi [2025/02/17 21:40] (current) nick [Enable SPI] |
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| - | ====== SPI ====== | ||
| - | ===== Introduction ===== | ||
| - | SPI interface usage examples on [[products: | + | ===== SPI Reference table ===== |
| - | ===== Reference table ===== | + | | |
| - | + | ^ VIM3/ | |
| - | | | + | | ::: | ::: |
| - | ^ VIM3/ | + | | ::: | ::: |
| - | | ::: | ::: | 16 | SPIB_SCLK | + | | ::: | ::: |
| - | | ::: | ::: | 35 | SPIB_MISO | + | ^ VIM4 |
| - | | ::: | ::: | 37 | SPIB_MOSI | + | | ::: | ::: |
| - | ^ VIM4 | + | | ::: | ::: |
| - | | ::: | + | | ::: | ::: |
| - | | ::: | + | ^ VIM1S | |
| - | | ::: | + | | ::: | ::: |
| - | ^ VIM1S | | + | | ::: | ::: |
| - | | ::: | + | | ::: | ::: |
| - | | ::: | + | |
| - | | ::: | + | |
| ===== Enable SPI ===== | ===== Enable SPI ===== | ||
| Line 44: | Line 40: | ||
| $ ls / | $ ls / | ||
| / | / | ||
| + | ``` | ||
| + | |||
| + | <tabbox VIM3 with 5.15 kernel> | ||
| + | |||
| + | Edit ''/ | ||
| + | |||
| + | |||
| + | e.g. Enable '' | ||
| + | |||
| + | ```shell | ||
| + | fdt_overlays=spi1 | ||
| + | ``` | ||
| + | |||
| + | After reboot, you will see the SPI device node. | ||
| + | |||
| + | ```shell | ||
| + | $ ls / | ||
| + | / | ||
| + | ``` | ||
| + | |||
| + | <tabbox VIM3L with 5.15 kernel> | ||
| + | |||
| + | Edit ''/ | ||
| + | |||
| + | |||
| + | e.g. Enable '' | ||
| + | |||
| + | ```shell | ||
| + | fdt_overlays=spi1 | ||
| + | |||
| + | ``` | ||
| + | |||
| + | After reboot, you will see the SPI device node. | ||
| + | |||
| + | ```shell | ||
| + | $ ls / | ||
| + | / | ||
| ``` | ``` | ||
| <tabbox VIM4> | <tabbox VIM4> | ||
| - | TODO. | + | Edit ''/ |
| + | |||
| + | e.g. Enable '' | ||
| + | |||
| + | ```shell | ||
| + | fdt_overlays=spi0 | ||
| + | |||
| + | ``` | ||
| + | |||
| + | After reboot, you will see the SPI device node. | ||
| + | |||
| + | ```shell | ||
| + | $ ls / | ||
| + | / | ||
| + | ``` | ||
| + | <tabbox VIM1S> | ||
| + | |||
| + | Edit ''/ | ||
| + | |||
| + | |||
| + | e.g. Enable '' | ||
| + | |||
| + | ```shell | ||
| + | fdt_overlays=spi0 | ||
| + | |||
| + | ``` | ||
| + | |||
| + | After reboot, you will see the SPI device node. | ||
| + | |||
| + | ```shell | ||
| + | $ ls / | ||
| + | / | ||
| + | ``` | ||
| </ | </ | ||
| Line 93: | Line 158: | ||
| } | } | ||
| - | static const char *device = "/ | + | static const char *device = "/ |
| static uint32_t mode; | static uint32_t mode; | ||
| static uint8_t bits = 8; | static uint8_t bits = 8; | ||
| Line 556: | Line 621: | ||
| ``` | ``` | ||
| - | Run '' | + | Connect PIN36(MOSI), |
| + | |||
| ```shell | ```shell | ||
| - | $ ./ | + | $ ./ |
| spi mode: 0x0 | spi mode: 0x0 | ||
| bits per word: 8 | bits per word: 8 | ||
| max speed: 500000 Hz (500 KHz) | max speed: 500000 Hz (500 KHz) | ||
| ``` | ``` | ||
| + | |||
| + | <WRAP important > | ||
| + | Please choose the correct spi device node. | ||
| + | </ | ||
| + | |||
| Check output data: | Check output data: | ||