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| 两侧同时换到之前的修订记录 前一修订版 后一修订版 | 前一修订版 | ||
|
mp_hsadc [2021/10/06 19:05] gongyusu |
mp_hsadc [2021/10/16 16:06] (当前版本) gongyusu [2. ST7789] |
||
|---|---|---|---|
| 行 1: | 行 1: | ||
| ## 100Msps ADC | ## 100Msps ADC | ||
| + | <code python> | ||
| + | import machine | ||
| + | machine.freq(200_000_000 ) | ||
| + | print( "done" ) | ||
| + | </code> | ||
| ### 1. DMA | ### 1. DMA | ||
| 行 125: | 行 130: | ||
| ) | ) | ||
| | | ||
| - | def write_register( self, reg, buf ): | + | def write_register( self, reg, buf ): # reg for command, buf for data |
| self.buf1[0] = reg | self.buf1[0] = reg | ||
| self.cs.value( 0 ) | self.cs.value( 0 ) | ||
| - | |||
| self.dc.value( 0 ) | self.dc.value( 0 ) | ||
| self.spi.write( self.buf1 ) | self.spi.write( self.buf1 ) | ||
| 行 140: | 行 144: | ||
| def write_register_dma( self, reg, buf, is_blocking=True ): | def write_register_dma( self, reg, buf, is_blocking=True ): | ||
| SPI1_BASE = 0x40040000 | SPI1_BASE = 0x40040000 | ||
| - | SSPDR = 0x008 | + | SSPDR = 0x008. #address of 16bit SPI1 TX FIFO |
| self.dma.config( | self.dma.config( | ||
| src_addr = uctypes.addressof( buf ), | src_addr = uctypes.addressof( buf ), | ||
| 行 152: | 行 156: | ||
| self.buf1[0] = reg | self.buf1[0] = reg | ||
| self.cs.value( 0 ) | self.cs.value( 0 ) | ||
| - | |||
| self.dc.value( 0 ) | self.dc.value( 0 ) | ||
| self.spi.write( self.buf1 ) | self.spi.write( self.buf1 ) | ||
| 行 526: | 行 529: | ||
| </code> | </code> | ||
| - | ### build & run demo | + | ### 6. build & run demo |
| <code python> | <code python> | ||
| def cb_btn( event ): | def cb_btn( event ): | ||