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楼主 |
发表于 2014-11-28 09:15:25
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在uint32 PioSetMapPins32(uint32 mask, uint32 bits);函数注释中,对PIO12到15如是说: (PIO 13..15) may be mapped if required. The exact signal routing is dependent
on which package is being used. On smaller packages, such as CSP, you must
map PIO13-15 if you want PIO instead of UART UART_RX, UART_TX and UART_CTS.
On the BGA package PIO13..15 have their own pins, but if mapped, will be
connected to the UART_RX, UART_TX and UART_CTS pins as well. Whether mapped
or not, these PIO pins may be configured as inputs or outputs. For each pin,
if mapped and set as output, both (UART and PIO) pins are driven. If mapped
and set as input, the UART pin is connected and the PIO pin is n/c.
我们现在用的是BGA package,又貌似没被用啊 |
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