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Hi all, This query is regarding usage of MCBSP 1 on the EVM for
TMS320C6701 processor. On the board a 80 pin connector i.e Expansion peripheral interface is present. The pin number 42 of this interface is stated to be DR pin of MCBSP 1, and i feel that this interface supports TTL logic. Ti provides daughter boards for interfacing to MCBSP1, but i don' want to use them. I want to take in a Serial bit stream from a counter into the DR pin throught the Expansion Peripheral Interface. Could anybody help me with this question ?? Thanks, Ram |
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MCBSP 1
Started by ●January 10, 2003
Reply by ●January 10, 20032003-01-10
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Hello Ram, Friday, January 10, 2003, 9:51:27 AM, you wrote: R> Hi all, This query is regarding usage of MCBSP 1 on the EVM for TMS320C6701 processor. On the board a 80 pin connector i.e Expansion peripheral interface is present. The pin number 42 of this R> interface is stated to be DR pin of MCBSP 1, and i feel that this interface supports TTL logic. Ti provides daughter boards for interfacing to MCBSP1, but i don' want to use them. I want to take R> in a Serial bit stream from a counter into the DR pin throught the Expansion Peripheral Interface. Could anybody help me with this question ?? Thanks, Ram If you go to http://www.samtec.com/technical_specifications/overview.asp?series=TFM you can request some samples. With this connector you can create a cable where pin pin mcbsp0 21 XCLKX0 22 XCLKS0 23 XFSX0 24 XDX0 25 GND 26 GND 27 XCLKR0 28 (N/C) 29 XFSR0 30 XDR0 31 GND 32 GND mcbsp1 33 XCLKX1 34 XCLKS1 ..... as mcbsp0 Warning that if you use a DSK read this : "The DSP's seven McBSP0 signals are available on the expansion peripheral interface only if you install JP1 and a shunt. McBSP0, by default (with JP1 uninstalled), ^^^^ is connected to the AIC's serial communication interface. McBSP0, when JP1 and its shunt are installed, is available for use on the daughterboard." -- Best regards, flavio mailto: -- FLAVIO BERNARDOTTI AMC Italy srl Dipartimento di ricerca e sviluppo Via La Pira, 21 10028 TROFARELLO (TO) ITALY Tel. +39 380 7097051 http://www.bernardotti.it |
Reply by ●January 10, 20032003-01-10
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Yes, it is TTL compatible. It is also 5V tolerant with the buffer on-board, so you are fine. Brian -----Original Message----- From: Ram [mailto:] Sent: Friday, January 10, 2003 2:51 AM To: Subject: [c6x] MCBSP 1 Hi all, This query is regarding usage of MCBSP 1 on the EVM for TMS320C6701 processor. On the board a 80 pin connector i.e Expansion peripheral interface is present. The pin number 42 of this interface is stated to be DR pin of MCBSP 1, and i feel that this interface supports TTL logic. Ti provides daughter boards for interfacing to MCBSP1, but i don' want to use them. I want to take in a Serial bit stream from a counter into the DR pin throught the Expansion Peripheral Interface. Could anybody help me with this question ?? Thanks, Ram _____________________________________ Note: If you do a simple "reply" with your email client, only the author of this message will receive your answer. You need to do a "reply all" if you want your answer to be distributed to the entire group. _____________________________________ About this discussion group: To Join: Send an email to To Post: Send an email to To Leave: Send an email to Archives: http://www.yahoogroups.com/group/c6x Other Groups: http://www.dsprelated.com ">http://docs.yahoo.com/info/terms/ |
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Reply by ●January 10, 20032003-01-10
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Hello Brian, Friday, January 10, 2003, 2:47:40 PM, you wrote: BC> Yes, it is TTL compatible. BC> It is also 5V tolerant with the buffer on-board, so BC> you are fine. BC> Brian Or you can set a resitor partition max 5V-----+ | - - R1 1800 ohm - | +---------------- max 3.3V | - - R2 2700 ohm - | gnd -------+---------------- gnd -- Best regards, flavio mailto: -- FLAVIO BERNARDOTTI AMC Italy srl Dipartimento di ricerca e sviluppo Via La Pira, 21 10028 TROFARELLO (TO) ITALY Tel. +39 380 7097051 http://www.bernardotti.it |
Reply by ●January 13, 20032003-01-13
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Hello Ram, Friday, January 10, 2003, 9:51:27 AM, you wrote: R> Hi all, This query is regarding usage of MCBSP 1 on the EVM for TMS320C6701 processor. On the board a 80 pin connector i.e Expansion peripheral interface is present. The pin number 42 of this R> interface is stated to be DR pin of MCBSP 1, and i feel that this interface supports TTL logic. Ti provides daughter boards for interfacing to MCBSP1, R> but i don' want to use them. I want to take Why ? On the Expansion connector of EVM (Samtec model TFM-32-S-D) there are mcbsp0 (pin 21 -> pin 30) and mcbsp1 (pin 33 -> pin 42). The limitation of these MCBSP are is the max. speed (100 mbits). R> in a Serial bit stream from a counter into the DR pin throught the Expansion Peripheral Interface. R> Could anybody help me with this question ?? Thanks, Ram Warning that only one mcbsp is 3.3-5.5V (mcbsp0) ..... In one of my projects I use the mcbsp0 to receive a VGA horizontal sync and the mcbsp1 to transmit an image. The mcbsp0 is connected directly to the VGA sync port. The sync signal is a 0-5V .... To be sure I use also a resitor partition to create a 3.3V VGA HSYNC max 5V-----+ | - - R1 1800 ohm - | +---------------- PIN 30 EVM Expansion Connector | XDR0 - - R2 2700 ohm - | gnd -----------------+---------------- PIN 32 gnd This is a sample routine to receive some data and to insert this into a buffer... void task(void) is a task created using BIOS function ..... #include <std.h> #include <clk.h> #include <idl.h> #include <log.h> #include <sem.h> #include <swi.h> #include <tsk.h> #include <csl_legacy.h> #include <csl.h> #include <csl_mcbsp.h> #include "slicecfg.h" MCBSP_HANDLE hMcbsp0; extern far LOG_Obj LogMain; static MCBSP_CONFIG ConfigMcbsp0 = { // La MCBSP0 usata per la ricezione MCBSP_MK_SPCR( MCBSP_SPCR_RRST_NO, MCBSP_SPCR_RINTM_RRDY, MCBSP_SPCR_DXENA_NA, MCBSP_SPCR_CLKSTP_DISABLE, MCBSP_SPCR_RJUST_RZF, MCBSP_SPCR_DLB_OFF, MCBSP_SPCR_XRST_YES, MCBSP_SPCR_XINTM_XRDY, MCBSP_SPCR_GRST_NO, MCBSP_SPCR_FRST_NO ), MCBSP_MK_RCR( MCBSP_RCR_RWDREVRS_NA, MCBSP_RCR_RWDLEN1_8BIT, MCBSP_RCR_RFRLEN1_OF(0), MCBSP_RCR_RPHASE2_NA, MCBSP_RCR_RDATDLY_0BIT, MCBSP_RCR_RFIG_NO, MCBSP_RCR_RCOMPAND_MSB, MCBSP_RCR_RWDLEN2_8BIT, MCBSP_RCR_RFRLEN2_OF(0), MCBSP_RCR_RPHASE_SINGLE ), MCBSP_MK_XCR( MCBSP_XCR_XWDREVRS_NA, MCBSP_XCR_XWDLEN1_8BIT, MCBSP_XCR_XFRLEN1_OF(0), MCBSP_XCR_XPHASE2_NA, MCBSP_XCR_XDATDLY_0BIT, // MCBSP_XCR_XFIG_NO, MCBSP_XCR_XCOMPAND_MSB, MCBSP_XCR_XWDLEN2_8BIT, MCBSP_XCR_XFRLEN2_OF(0), MCBSP_XCR_XPHASE_SINGLE ), MCBSP_MK_SRGR( MCBSP_SRGR_CLKGDV_OF(0), // Divisore MCBSP_SRGR_FWID_OF(0), // Frame width MCBSP_SRGR_FPER_OF(7), // Period MCBSP_SRGR_FSGM_FSG, // MCBSP_SRGR_CLKSM_INTERNAL, MCBSP_SRGR_CLKSP_RISING, MCBSP_SRGR_GSYNC_FREE ), MCBSP_MCR_DEFAULT, MCBSP_RCER_DEFAULT, MCBSP_XCER_DEFAULT, MCBSP_MK_PCR( MCBSP_PCR_CLKRP_FALLING, MCBSP_PCR_CLKXP_RISING, MCBSP_PCR_FSRP_ACTIVEHIGH, MCBSP_PCR_FSXP_ACTIVEHIGH, MCBSP_PCR_DXSTAT_0, MCBSP_PCR_CLKSSTAT_0, MCBSP_PCR_CLKRM_OUTPUT, MCBSP_PCR_CLKXM_OUTPUT, MCBSP_PCR_FSRM_INTERNAL, MCBSP_PCR_FSXM_INTERNAL, MCBSP_PCR_RIOEN_SP, MCBSP_PCR_XIOEN_SP ) }; Void taskRx(Arg id_arg); Uns counts_per_us; /* hardware timer counts per microsecond */ Void main() { CSL_init(); hMcbsp0 = MCBSP_open(MCBSP_DEV0, MCBSP_OPEN_RESET); MCBSP_ConfigA(hMcbsp0, &ConfigMcbsp0); MCBSP_enableSrgr(hMcbsp0); MCBSP_enableRcv(hMcbsp0); MCBSP_EnableFsync(hMcbsp0); } unsigned char buffer[128]; int blen; void task(void) { Uint32 x; blen = 0; while (1) { if(MCBSP_rrdy(hMcbsp0)) { x = MCBSP_read(hMcbsp0); if(blen > 126) blen = 0; buffer[blen++] = (unsigned char) (x & 0xff); } } } -- Best regards, flavio mailto: -- FLAVIO BERNARDOTTI AMC Italy srl Biometric Security Solutions Research and Development Department Via La Pira, 21 10028 TROFARELLO (TO) ITALY Tel. +39 011 6804011 Fax. +39 011 6804014 Dir. +39 380 7097051 Dir. +39 347 5610956 http://www.amcitaly.net http://www.biotracciabilita.info Personal sites: http://www.crackinguniversity2000.it http://www.bernardotti.it http://www.bernardotti.al.it |
