LPC MicrocontrollersのトピックBursting from SSP https://community.nxp.com/t5/LPC-Microcontrollers/Bursting-from-SSP/m-p/522768#M5404 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by tvink on Fri Feb 27 08:11:47 MST 2015</STRONG><BR /><SPAN>Hi,</SPAN><BR /><BR /><SPAN>I am reading UM10430 and trying to figure out how DMA burst would work from a SSP peripheral.</SPAN><BR /><BR /><SPAN>Table 250 indicates that there is a BREQ signal from the SSP0 and SSP1 peripherals.</SPAN><BR /><BR /><SPAN>But when I go to the SSP section of the document there is no DMA info except for table 903 which </SPAN><BR /><SPAN>describes the two DMA enable bits.&nbsp; There must be more to it than that!</SPAN><BR /><BR /><SPAN>So how does DMA bursting from the SSP work?&nbsp; I want to receive 8 frames when my SPI external device</SPAN><BR /><SPAN>makes an IRQ.&nbsp; Do I have to make a soft burst request in the ISR for the device?&nbsp; But then what is the BREQ signal for? and how does it get activated?</SPAN><BR /><BR /><BR /><SPAN>Confused...</SPAN><BR /><BR /><SPAN>Thanks,</SPAN><BR /><SPAN>Tony</SPAN></BODY></HTML> Wed, 15 Jun 2016 16:42:01 GMT lpcware 2016-06-15T16:42:01Z Bursting from SSP https://community.nxp.com/t5/LPC-Microcontrollers/Bursting-from-SSP/m-p/522768#M5404 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by tvink on Fri Feb 27 08:11:47 MST 2015</STRONG><BR /><SPAN>Hi,</SPAN><BR /><BR /><SPAN>I am reading UM10430 and trying to figure out how DMA burst would work from a SSP peripheral.</SPAN><BR /><BR /><SPAN>Table 250 indicates that there is a BREQ signal from the SSP0 and SSP1 peripherals.</SPAN><BR /><BR /><SPAN>But when I go to the SSP section of the document there is no DMA info except for table 903 which </SPAN><BR /><SPAN>describes the two DMA enable bits.&nbsp; There must be more to it than that!</SPAN><BR /><BR /><SPAN>So how does DMA bursting from the SSP work?&nbsp; I want to receive 8 frames when my SPI external device</SPAN><BR /><SPAN>makes an IRQ.&nbsp; Do I have to make a soft burst request in the ISR for the device?&nbsp; But then what is the BREQ signal for? and how does it get activated?</SPAN><BR /><BR /><BR /><SPAN>Confused...</SPAN><BR /><BR /><SPAN>Thanks,</SPAN><BR /><SPAN>Tony</SPAN></BODY></HTML> Wed, 15 Jun 2016 16:42:01 GMT https://community.nxp.com/t5/LPC-Microcontrollers/Bursting-from-SSP/m-p/522768#M5404 lpcware 2016-06-15T16:42:01Z